28820974 has 16 divisors (see below), whose sum is σ = 53208288. Its totient is φ = 11401632.

The previous prime is 28820963. The next prime is 28820993. The reversal of 28820974 is 47902882.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78997 + ... + 79360.

It is an arithmetic number, because the mean of its divisors is an integer number (3325518).

Almost surely, 2^28820974 is an apocalyptic number.

28820974 is a deficient number, since it is larger than the sum of its proper divisors (24387314).

28820974 is a wasteful number, since it uses less digits than its factorization.

28820974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158379.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 28820974 is about 5368.5169274205. The cubic root of 28820974 is about 306.5981649663.

The spelling of 28820974 in words is "twenty-eight million, eight hundred twenty thousand, nine hundred seventy-four".