285440172 has 24 divisors (see below), whose sum is σ = 666312192. Its totient is φ = 95106000.

The previous prime is 285440137. The next prime is 285440179. The reversal of 285440172 is 271044582.

It is not an unprimeable number, because it can be changed into a prime (285440179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40297 + ... + 46847.

It is an arithmetic number, because the mean of its divisors is an integer number (27763008).

Almost surely, 2^285440172 is an apocalyptic number.

It is an amenable number.

285440172 is an abundant number, since it is smaller than the sum of its proper divisors (380872020).

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

285440172 is a wasteful number, since it uses less digits than its factorization.

285440172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10189 (or 10187 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 33.

The square root of 285440172 is about 16894.9747558261. The cubic root of 285440172 is about 658.4230579768.

The spelling of 285440172 in words is "two hundred eighty-five million, four hundred forty thousand, one hundred seventy-two".