28420402992 has 40 divisors (see below), whose sum is σ = 73510228080. Its totient is φ = 9461744640.

The previous prime is 28420402961. The next prime is 28420402993. The reversal of 28420402992 is 29920402482.

It is not an unprimeable number, because it can be changed into a prime (28420402993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327109 + ... + 404772.

It is an arithmetic number, because the mean of its divisors is an integer number (1837755702).

Almost surely, 2^28420402992 is an apocalyptic number.

It is an amenable number.

28420402992 is an abundant number, since it is smaller than the sum of its proper divisors (45089825088).

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

28420402992 is a wasteful number, since it uses less digits than its factorization.

28420402992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732701 (or 732695 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The spelling of 28420402992 in words is "twenty-eight billion, four hundred twenty million, four hundred two thousand, nine hundred ninety-two".