39494394720 has 960 divisors, whose sum is σ = 161824703040. Its totient is φ = 8980070400.

The previous prime is 39494394677. The next prime is 39494394721. The reversal of 39494394720 is 2749349493.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39494394721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 169503724 + ... + 169503956.

It is an arithmetic number, because the mean of its divisors is an integer number (168567399).

Almost surely, 2^39494394720 is an apocalyptic number.

39494394720 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 39494394720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80912351520).

39494394720 is an abundant number, since it is smaller than the sum of its proper divisors (122330308320).

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

39494394720 is a wasteful number, since it uses less digits than its factorization.

39494394720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 54.

The spelling of 39494394720 in words is "thirty-nine billion, four hundred ninety-four million, three hundred ninety-four thousand, seven hundred twenty".