28626690 has 32 divisors (see below), whose sum is σ = 69834816. Its totient is φ = 7508160.

The previous prime is 28626679. The next prime is 28626707. The reversal of 28626690 is 9662682.

It is a super-2 number, since 2×28626690² = 1638974760712200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5992 + ... + 9651.

It is an arithmetic number, because the mean of its divisors is an integer number (2182338).

Almost surely, 2^28626690 is an apocalyptic number.

28626690 is an abundant number, since it is smaller than the sum of its proper divisors (41208126).

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

28626690 is a wasteful number, since it uses less digits than its factorization.

28626690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15714.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 28626690 is about 5350.3915744551. The cubic root of 28626690 is about 305.9076785868.

The spelling of 28626690 in words is "twenty-eight million, six hundred twenty-six thousand, six hundred ninety".