28666925952 has 128 divisors (see below), whose sum is σ = 90025689600. Its totient is φ = 7908096000.

The previous prime is 28666925941. The next prime is 28666925977. The reversal of 28666925952 is 25952966682.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×28666925952² (a number of 22 digits) contains 22 as substring.

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, 105924 + ... + 261827.

It is an arithmetic number, because the mean of its divisors is an integer number (703325700).

Almost surely, 2^28666925952 is an apocalyptic number.

It is an amenable number.

28666925952 is an abundant number, since it is smaller than the sum of its proper divisors (61358763648).

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

28666925952 is a wasteful number, since it uses less digits than its factorization.

28666925952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367804 (or 367792 counting only the distinct ones).

The product of its digits is 27993600, while the sum is 60.

The spelling of 28666925952 in words is "twenty-eight billion, six hundred sixty-six million, nine hundred twenty-five thousand, nine hundred fifty-two".