28974645 has 32 divisors (see below), whose sum is σ = 58871040. Its totient is φ = 13245120.

The previous prime is 28974629. The next prime is 28974653. The reversal of 28974645 is 54647982.

It is a happy number.

It is not a de Polignac number, because 28974645 - 2⁴ = 28974629 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28974645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14386 + ... + 16275.

It is an arithmetic number, because the mean of its divisors is an integer number (1839720).

Almost surely, 2^28974645 is an apocalyptic number.

It is an amenable number.

28974645 is an abundant number, since it is smaller than the sum of its proper divisors (29896395).

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

28974645 is a wasteful number, since it uses less digits than its factorization.

28974645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30682 (or 30676 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 28974645 is about 5382.8101396947. The cubic root of 28974645 is about 307.1421178483.

The spelling of 28974645 in words is "twenty-eight million, nine hundred seventy-four thousand, six hundred forty-five".