28438575292 has 12 divisors (see below), whose sum is σ = 49773044776. Its totient is φ = 14217705360.

The previous prime is 28438575257. The next prime is 28438575293. The reversal of 28438575292 is 29257583482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28438575293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 354663 + ... + 427390.

Almost surely, 2^28438575292 is an apocalyptic number.

It is an amenable number.

28438575292 is a deficient number, since it is larger than the sum of its proper divisors (21334469484).

28438575292 is a wasteful number, since it uses less digits than its factorization.

28438575292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791148 (or 791146 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 55.

The spelling of 28438575292 in words is "twenty-eight billion, four hundred thirty-eight million, five hundred seventy-five thousand, two hundred ninety-two".