1157638928 has 10 divisors (see below), whose sum is σ = 2242925454. Its totient is φ = 578819456.

The previous prime is 1157638913. The next prime is 1157638957. The reversal of 1157638928 is 8298367511.

It can be written as a sum of positive squares in only one way, i.e., 939545104 + 218093824 = 30652^2 + 14768^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36176201 + ... + 36176232.

Almost surely, 2^1157638928 is an apocalyptic number.

It is an amenable number.

1157638928 is a deficient number, since it is larger than the sum of its proper divisors (1085286526).

1157638928 is an equidigital number, since it uses as much as digits as its factorization.

1157638928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72352441 (or 72352435 counting only the distinct ones).

The product of its digits is 725760, while the sum is 50.

The square root of 1157638928 is about 34024.0933457455. The cubic root of 1157638928 is about 1050.0042110186.

The spelling of 1157638928 in words is "one billion, one hundred fifty-seven million, six hundred thirty-eight thousand, nine hundred twenty-eight".