28923803772 has 12 divisors (see below), whose sum is σ = 67488875496. Its totient is φ = 9641267920.

The previous prime is 28923803749. The next prime is 28923803809. The reversal of 28923803772 is 27730832982.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×28923803772² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1205158479 + ... + 1205158502.

It is an arithmetic number, because the mean of its divisors is an integer number (5624072958).

Almost surely, 2^28923803772 is an apocalyptic number.

It is an amenable number.

28923803772 is an abundant number, since it is smaller than the sum of its proper divisors (38565071724).

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

28923803772 is a wasteful number, since it uses less digits than its factorization.

28923803772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2410316988 (or 2410316986 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 51.

It can be divided in two parts, 28923 and 803772, that added together give a triangular number (832695 = T₁₂₉₀).

The spelling of 28923803772 in words is "twenty-eight billion, nine hundred twenty-three million, eight hundred three thousand, seven hundred seventy-two".