39390516 has 96 divisors (see below), whose sum is σ = 113218560. Its totient is φ = 11743200.

The previous prime is 39390499. The next prime is 39390517. The reversal of 39390516 is 61509393.

It is a super-2 number, since 2×39390516² = 3103225501492512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39390517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84115 + ... + 84581.

It is an arithmetic number, because the mean of its divisors is an integer number (1179360).

Almost surely, 2^39390516 is an apocalyptic number.

39390516 is a gapful number since it is divisible by the number (36) 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 39390516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56609280).

39390516 is an abundant number, since it is smaller than the sum of its proper divisors (73828044).

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

39390516 is a wasteful number, since it uses less digits than its factorization.

39390516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562 (or 554 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 36.

The square root of 39390516 is about 6276.1864217055. The cubic root of 39390516 is about 340.2492866142.

It can be divided in two parts, 393 and 90516, that added together give a palindrome (90909).

The spelling of 39390516 in words is "thirty-nine million, three hundred ninety thousand, five hundred sixteen".