28938456 has 48 divisors (see below), whose sum is σ = 80294760. Its totient is φ = 9409920.

The previous prime is 28938451. The next prime is 28938517. The reversal of 28938456 is 65483982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28938451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1950 + ... + 7853.

Almost surely, 2^28938456 is an apocalyptic number.

It is an amenable number.

28938456 is an abundant number, since it is smaller than the sum of its proper divisors (51356304).

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

28938456 is a wasteful number, since it uses less digits than its factorization.

28938456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9856 (or 9849 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 28938456 is about 5379.4475552793. The cubic root of 28938456 is about 307.0141922443.

The spelling of 28938456 in words is "twenty-eight million, nine hundred thirty-eight thousand, four hundred fifty-six".