28815045 has 32 divisors (see below), whose sum is σ = 54121728. Its totient is φ = 12814848.

The previous prime is 28815043. The next prime is 28815079. The reversal of 28815045 is 54051882.

It is not a de Polignac number, because 28815045 - 2¹ = 28815043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28814997 and 28815015.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 177 + ... + 7593.

It is an arithmetic number, because the mean of its divisors is an integer number (1691304).

Almost surely, 2^28815045 is an apocalyptic number.

It is an amenable number.

28815045 is a deficient number, since it is larger than the sum of its proper divisors (25306683).

28815045 is a wasteful number, since it uses less digits than its factorization.

28815045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7469.

The product of its (nonzero) digits is 12800, while the sum is 33.

The square root of 28815045 is about 5367.9646980955. The cubic root of 28815045 is about 306.5771392463.

The spelling of 28815045 in words is "twenty-eight million, eight hundred fifteen thousand, forty-five".