28063642932 has 72 divisors (see below), whose sum is σ = 78460263336. Its totient is φ = 8401584384.

The previous prime is 28063642927. The next prime is 28063642961. The reversal of 28063642932 is 23924636082.

It is a happy number.

28063642932 is a `hidden beast` number, since 2 + 8 + 0 + 636 + 4 + 2 + 9 + 3 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4348874916 + 23714768016 = 65946^2 + 153996^2 .

It is a super-2 number, since 2×28063642932² (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 23 ways as a sum of consecutive naturals, for example, 793023 + ... + 827654.

Almost surely, 2^28063642932 is an apocalyptic number.

It is an amenable number.

28063642932 is an abundant number, since it is smaller than the sum of its proper divisors (50396620404).

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

28063642932 is a wasteful number, since it uses less digits than its factorization.

28063642932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620737 (or 1620732 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 45.

The spelling of 28063642932 in words is "twenty-eight billion, sixty-three million, six hundred forty-two thousand, nine hundred thirty-two".