1038640807928 has 16 divisors (see below), whose sum is σ = 1984195883880. Its totient is φ = 509521905568.

The previous prime is 1038640807913. The next prime is 1038640807949. The reversal of 1038640807928 is 8297080468301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1224811850 + ... + 1224812697.

Almost surely, 2^{1038640807928} is an apocalyptic number.

It is an amenable number.

1038640807928 is a deficient number, since it is larger than the sum of its proper divisors (945555075952).

1038640807928 is a wasteful number, since it uses less digits than its factorization.

1038640807928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2449624606 (or 2449624602 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 56.

The spelling of 1038640807928 in words is "one trillion, thirty-eight billion, six hundred forty million, eight hundred seven thousand, nine hundred twenty-eight".