405360172 has 24 divisors (see below), whose sum is σ = 858410784. Its totient is φ = 163506432.

The previous prime is 405360169. The next prime is 405360181. The reversal of 405360172 is 271063504.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 405360172.

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, 425323 + ... + 426274.

It is an arithmetic number, because the mean of its divisors is an integer number (35767116).

Almost surely, 2^405360172 is an apocalyptic number.

It is an amenable number.

405360172 is an abundant number, since it is smaller than the sum of its proper divisors (453050612).

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

405360172 is a wasteful number, since it uses less digits than its factorization.

405360172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851625 (or 851623 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 405360172 is about 20133.5583541509. The cubic root of 405360172 is about 740.0828809044.

The spelling of 405360172 in words is "four hundred five million, three hundred sixty thousand, one hundred seventy-two".