28557634 has 32 divisors (see below), whose sum is σ = 52300800. Its totient is φ = 11430720.

The previous prime is 28557553. The next prime is 28557643. The reversal of 28557634 is 43675582.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11452 + ... + 13720.

It is an arithmetic number, because the mean of its divisors is an integer number (1634400).

Almost surely, 2^28557634 is an apocalyptic number.

28557634 is a deficient number, since it is larger than the sum of its proper divisors (23743166).

28557634 is a wasteful number, since it uses less digits than its factorization.

28557634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2338.

The product of its digits is 201600, while the sum is 40.

The square root of 28557634 is about 5343.9343184586. The cubic root of 28557634 is about 305.6615007502.

The spelling of 28557634 in words is "twenty-eight million, five hundred fifty-seven thousand, six hundred thirty-four".