28490974 has 12 divisors (see below), whose sum is σ = 44651304. Its totient is φ = 13608804.

The previous prime is 28490927. The next prime is 28490981. The reversal of 28490974 is 47909482.

It is a self number, because there is not a number n which added to its sum of digits gives 28490974.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35809 + ... + 36595.

It is an arithmetic number, because the mean of its divisors is an integer number (3720942).

Almost surely, 2^28490974 is an apocalyptic number.

28490974 is a deficient number, since it is larger than the sum of its proper divisors (16160330).

28490974 is an frugal number, since it uses more digits than its factorization.

28490974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1599 (or 812 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 28490974 is about 5337.6936967196. The cubic root of 28490974 is about 305.4234876871.

The spelling of 28490974 in words is "twenty-eight million, four hundred ninety thousand, nine hundred seventy-four".