28510038 has 24 divisors (see below), whose sum is σ = 62022168. Its totient is φ = 9464832.

The previous prime is 28510007. The next prime is 28510057. The reversal of 28510038 is 83001582.

It is a happy number.

It is a super-2 number, since 2×28510038² = 1625644533522888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28509993 and 28510020.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1545 + ... + 7707.

It is an arithmetic number, because the mean of its divisors is an integer number (2584257).

Almost surely, 2^28510038 is an apocalyptic number.

28510038 is an abundant number, since it is smaller than the sum of its proper divisors (33512130).

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

28510038 is a wasteful number, since it uses less digits than its factorization.

28510038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6428 (or 6425 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 28510038 is about 5339.4791880857. The cubic root of 28510038 is about 305.4915945804.

The spelling of 28510038 in words is "twenty-eight million, five hundred ten thousand, thirty-eight".