39657487428 has 144 divisors (see below), whose sum is σ = 111803467776. Its totient is φ = 11770064640.

The previous prime is 39657487427. The next prime is 39657487433. The reversal of 39657487428 is 82478475693.

39657487428 is a `hidden beast` number, since 3 + 9 + 65 + 74 + 87 + 428 = 666.

It is not an unprimeable number, because it can be changed into a prime (39657487427) 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 47 ways as a sum of consecutive naturals, for example, 4594725 + ... + 4603347.

Almost surely, 2^39657487428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39657487428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55901733888).

39657487428 is an abundant number, since it is smaller than the sum of its proper divisors (72145980348).

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

39657487428 is a wasteful number, since it uses less digits than its factorization.

39657487428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8994 (or 8989 counting only the distinct ones).

The product of its digits is 81285120, while the sum is 63.

The spelling of 39657487428 in words is "thirty-nine billion, six hundred fifty-seven million, four hundred eighty-seven thousand, four hundred twenty-eight".