220770172 has 12 divisors (see below), whose sum is σ = 441540400. Its totient is φ = 94615776.

The previous prime is 220770133. The next prime is 220770197. The reversal of 220770172 is 271077022.

220770172 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 7884649 = 220770172 / (2 + 2 + 0 + 7 + 7 + 0 + 1 + 7 + 2).

It is a self number, because there is not a number n which added to its sum of digits gives 220770172.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3942297 + ... + 3942352.

Almost surely, 2^220770172 is an apocalyptic number.

It is an amenable number.

220770172 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

220770172 is a wasteful number, since it uses less digits than its factorization.

220770172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7884660 (or 7884658 counting only the distinct ones).

The product of its (nonzero) digits is 2744, while the sum is 28.

The square root of 220770172 is about 14858.3367844453. The cubic root of 220770172 is about 604.3847051396.

The spelling of 220770172 in words is "two hundred twenty million, seven hundred seventy thousand, one hundred seventy-two".