28815051 has 16 divisors (see below), whose sum is σ = 40860288. Its totient is φ = 18000000.

The previous prime is 28815043. The next prime is 28815079. The reversal of 28815051 is 15051882.

It is not a de Polignac number, because 28815051 - 2³ = 28815043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28815091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11676 + ... + 13926.

It is an arithmetic number, because the mean of its divisors is an integer number (2553768).

Almost surely, 2^28815051 is an apocalyptic number.

28815051 is a deficient number, since it is larger than the sum of its proper divisors (12045237).

28815051 is a wasteful number, since it uses less digits than its factorization.

28815051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2522.

The product of its (nonzero) digits is 3200, while the sum is 30.

The square root of 28815051 is about 5367.9652569666. The cubic root of 28815051 is about 306.5771605253.

The spelling of 28815051 in words is "twenty-eight million, eight hundred fifteen thousand, fifty-one".