28057730508 has 48 divisors (see below), whose sum is σ = 73188581760. Its totient is φ = 9295193232.

The previous prime is 28057730507. The next prime is 28057730527. The reversal of 28057730508 is 80503775082.

28057730508 is a `hidden beast` number, since 28 + 0 + 57 + 73 + 0 + 508 = 666.

It is not an unprimeable number, because it can be changed into a prime (28057730507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 779310 + ... + 814517.

It is an arithmetic number, because the mean of its divisors is an integer number (1524762120).

Almost surely, 2^28057730508 is an apocalyptic number.

It is an amenable number.

28057730508 is an abundant number, since it is smaller than the sum of its proper divisors (45130851252).

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

28057730508 is a wasteful number, since it uses less digits than its factorization.

28057730508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1594003 (or 1593995 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 45.

The spelling of 28057730508 in words is "twenty-eight billion, fifty-seven million, seven hundred thirty thousand, five hundred eight".