39690000000 has 960 divisors, whose sum is σ = 171751025160. Its totient is φ = 9072000000.

The previous prime is 39689999989. The next prime is 39690000001. The reversal of 39690000000 is 9693.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 4 ways, for example, as 23940753984 + 15749246016 = 154728^2 + 125496^2 .

It is a tau number, because it is divible by the number of its divisors (960).

It is a super-2 number, since 2×39690000000² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is not an unprimeable number, because it can be changed into a prime (39690000001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 5669999997 + ... + 5670000003.

Almost surely, 2^39690000000 is an apocalyptic number.

39690000000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39690000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85875512580).

39690000000 is an abundant number, since it is smaller than the sum of its proper divisors (132061025160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39690000000 is an frugal number, since it uses more digits than its factorization.

39690000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75 (or 17 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

Adding to 39690000000 its reverse (9693), we get a palindrome (39690009693).

The spelling of 39690000000 in words is "thirty-nine billion, six hundred ninety million", and thus it is an aban number.