28696627990 has 32 divisors (see below), whose sum is σ = 52044449184. Its totient is φ = 11392043520.

The previous prime is 28696627909. The next prime is 28696628003. The reversal of 28696627990 is 9972669682.

It is a congruent number.

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, 1372797 + ... + 1393543.

It is an arithmetic number, because the mean of its divisors is an integer number (1626389037).

Almost surely, 2^28696627990 is an apocalyptic number.

28696627990 is a deficient number, since it is larger than the sum of its proper divisors (23347821194).

28696627990 is a wasteful number, since it uses less digits than its factorization.

28696627990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21792.

The product of its (nonzero) digits is 35271936, while the sum is 64.

The spelling of 28696627990 in words is "twenty-eight billion, six hundred ninety-six million, six hundred twenty-seven thousand, nine hundred ninety".