28815048 has 32 divisors (see below), whose sum is σ = 80042400. Its totient is φ = 9604944.

The previous prime is 28815043. The next prime is 28815079. The reversal of 28815048 is 84051882.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28815043) 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, 66486 + ... + 66917.

It is an arithmetic number, because the mean of its divisors is an integer number (2501325).

Almost surely, 2^28815048 is an apocalyptic number.

It is an amenable number.

28815048 is an abundant number, since it is smaller than the sum of its proper divisors (51227352).

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

28815048 is a wasteful number, since it uses less digits than its factorization.

28815048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133418 (or 133408 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 28815048 is about 5367.9649775311. The cubic root of 28815048 is about 306.5771498858.

The spelling of 28815048 in words is "twenty-eight million, eight hundred fifteen thousand, forty-eight".