28528017690 has 32 divisors (see below), whose sum is σ = 68550696576. Its totient is φ = 7598198720.

The previous prime is 28528017677. The next prime is 28528017709. The reversal of 28528017690 is 9671082582.

It is a super-2 number, since 2×28528017690² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 554502 + ... + 603761.

It is an arithmetic number, because the mean of its divisors is an integer number (2142209268).

Almost surely, 2^28528017690 is an apocalyptic number.

28528017690 is an abundant number, since it is smaller than the sum of its proper divisors (40022678886).

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

28528017690 is a wasteful number, since it uses less digits than its factorization.

28528017690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159094.

The product of its (nonzero) digits is 483840, while the sum is 48.

The spelling of 28528017690 in words is "twenty-eight billion, five hundred twenty-eight million, seventeen thousand, six hundred ninety".