28690836630 has 32 divisors (see below), whose sum is σ = 68872737024. Its totient is φ = 7649253216.

The previous prime is 28690836599. The next prime is 28690836631. The reversal of 28690836630 is 3663809682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28690836631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43719 + ... + 243501.

It is an arithmetic number, because the mean of its divisors is an integer number (2152273032).

Almost surely, 2^28690836630 is an apocalyptic number.

28690836630 is an abundant number, since it is smaller than the sum of its proper divisors (40181900394).

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

28690836630 is a wasteful number, since it uses less digits than its factorization.

28690836630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204580.

The product of its (nonzero) digits is 2239488, while the sum is 51.

The spelling of 28690836630 in words is "twenty-eight billion, six hundred ninety million, eight hundred thirty-six thousand, six hundred thirty".