28423775232 has 176 divisors, whose sum is σ = 85336646080. Its totient is φ = 9344139264.

The previous prime is 28423775203. The next prime is 28423775327. The reversal of 28423775232 is 23257732482.

28423775232 is a `hidden beast` number, since 2 + 8 + 42 + 377 + 5 + 232 = 666.

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, 2011263 + ... + 2025345.

Almost surely, 2^28423775232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28423775232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42668323040).

28423775232 is an abundant number, since it is smaller than the sum of its proper divisors (56912870848).

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

28423775232 is a wasteful number, since it uses less digits than its factorization.

28423775232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14185 (or 14161 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 45.

The spelling of 28423775232 in words is "twenty-eight billion, four hundred twenty-three million, seven hundred seventy-five thousand, two hundred thirty-two".