28917522 has 12 divisors (see below), whose sum is σ = 62654670. Its totient is φ = 9639168.

The previous prime is 28917521. The next prime is 28917523. The reversal of 28917522 is 22571982.

It is an interprime number because it is at equal distance from previous prime (28917521) and next prime (28917523).

It can be written as a sum of positive squares in only one way, i.e., 26224641 + 2692881 = 5121^2 + 1641^2 .

It is not an unprimeable number, because it can be changed into a prime (28917521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 803247 + ... + 803282.

Almost surely, 2^28917522 is an apocalyptic number.

28917522 is an abundant number, since it is smaller than the sum of its proper divisors (33737148).

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

28917522 is a wasteful number, since it uses less digits than its factorization.

28917522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606537 (or 1606534 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 28917522 is about 5377.5014644349. The cubic root of 28917522 is about 306.9401433099.

The spelling of 28917522 in words is "twenty-eight million, nine hundred seventeen thousand, five hundred twenty-two".