28977172 has 24 divisors (see below), whose sum is σ = 58310784. Its totient is φ = 12342432.

The previous prime is 28977161. The next prime is 28977181. The reversal of 28977172 is 27177982.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1578 + ... + 7774.

It is an arithmetic number, because the mean of its divisors is an integer number (2429616).

Almost surely, 2^28977172 is an apocalyptic number.

It is an amenable number.

28977172 is an abundant number, since it is smaller than the sum of its proper divisors (29333612).

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

28977172 is a wasteful number, since it uses less digits than its factorization.

28977172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6375 (or 6373 counting only the distinct ones).

The product of its digits is 98784, while the sum is 43.

The square root of 28977172 is about 5383.0448632721. The cubic root of 28977172 is about 307.1510466384.

The spelling of 28977172 in words is "twenty-eight million, nine hundred seventy-seven thousand, one hundred seventy-two".