28975530 has 16 divisors (see below), whose sum is σ = 69541344. Its totient is φ = 7726800.

The previous prime is 28975517. The next prime is 28975537. The reversal of 28975530 is 3557982.

It is not an unprimeable number, because it can be changed into a prime (28975537) 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, 482896 + ... + 482955.

It is an arithmetic number, because the mean of its divisors is an integer number (4346334).

Almost surely, 2^28975530 is an apocalyptic number.

28975530 is an abundant number, since it is smaller than the sum of its proper divisors (40565814).

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

28975530 is a wasteful number, since it uses less digits than its factorization.

28975530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965861.

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 28975530 is about 5382.8923451988. The cubic root of 28975530 is about 307.1452449272.

The spelling of 28975530 in words is "twenty-eight million, nine hundred seventy-five thousand, five hundred thirty".