28750038 has 16 divisors (see below), whose sum is σ = 58193856. Its totient is φ = 9467720.

The previous prime is 28750031. The next prime is 28750067. The reversal of 28750038 is 83005782.

It is a junction number, because it is equal to n+sod(n) for n = 28749990 and 28750008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28750031) 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, 28368 + ... + 29363.

It is an arithmetic number, because the mean of its divisors is an integer number (3637116).

Almost surely, 2^28750038 is an apocalyptic number.

28750038 is an abundant number, since it is smaller than the sum of its proper divisors (29443818).

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

28750038 is a wasteful number, since it uses less digits than its factorization.

28750038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57819.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 28750038 is about 5361.9061908989. The cubic root of 28750038 is about 306.3464187313.

The spelling of 28750038 in words is "twenty-eight million, seven hundred fifty thousand, thirty-eight".