28488670 has 16 divisors (see below), whose sum is σ = 58605408. Its totient is φ = 9767520.

The previous prime is 28488653. The next prime is 28488703. The reversal of 28488670 is 7688482.

28488670 = 21² + 22² + ... + 440².

It is a congruent number.

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, 203421 + ... + 203560.

It is an arithmetic number, because the mean of its divisors is an integer number (3662838).

Almost surely, 2^28488670 is an apocalyptic number.

28488670 is an abundant number, since it is smaller than the sum of its proper divisors (30116738).

28488670 is a wasteful number, since it uses less digits than its factorization.

28488670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406995.

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 28488670 is about 5337.4778688066. The cubic root of 28488670 is about 305.4152544985.

The spelling of 28488670 in words is "twenty-eight million, four hundred eighty-eight thousand, six hundred seventy".