28554690 has 32 divisors (see below), whose sum is σ = 69204096. Its totient is φ = 7539840.

The previous prime is 28554683. The next prime is 28554703. The reversal of 28554690 is 9645582.

It is a super-2 number, since 2×28554690² = 1630740641992200, 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, 1531 + ... + 7710.

It is an arithmetic number, because the mean of its divisors is an integer number (2162628).

Almost surely, 2^28554690 is an apocalyptic number.

28554690 is an abundant number, since it is smaller than the sum of its proper divisors (40649406).

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

28554690 is a wasteful number, since it uses less digits than its factorization.

28554690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9354.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 28554690 is about 5343.6588588719. The cubic root of 28554690 is about 305.6509968644.

The spelling of 28554690 in words is "twenty-eight million, five hundred fifty-four thousand, six hundred ninety".