28312522 has 16 divisors (see below), whose sum is σ = 49018752. Its totient is φ = 12013200.

The previous prime is 28312499. The next prime is 28312561. The reversal of 28312522 is 22521382.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8598 + ... + 11425.

It is an arithmetic number, because the mean of its divisors is an integer number (3063672).

Almost surely, 2^28312522 is an apocalyptic number.

28312522 is a deficient number, since it is larger than the sum of its proper divisors (20706230).

28312522 is a wasteful number, since it uses less digits than its factorization.

28312522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20133.

The product of its digits is 1920, while the sum is 25.

The square root of 28312522 is about 5320.9512307481. The cubic root of 28312522 is about 304.7844827031.

The spelling of 28312522 in words is "twenty-eight million, three hundred twelve thousand, five hundred twenty-two".