172274436 has 18 divisors (see below), whose sum is σ = 435471582. Its totient is φ = 57424800.

The previous prime is 172274371. The next prime is 172274437. The reversal of 172274436 is 634472271.

It can be written as a sum of positive squares in only one way, i.e., 167184900 + 5089536 = 12930^2 + 2256^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 4785401 = 172274436 / (1 + 7 + 2 + 2 + 7 + 4 + 4 + 3 + 6).

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 172274436.

It is not an unprimeable number, because it can be changed into a prime (172274437) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2392665 + ... + 2392736.

Almost surely, 2^172274436 is an apocalyptic number.

It is an amenable number.

172274436 is an abundant number, since it is smaller than the sum of its proper divisors (263197146).

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

172274436 is a wasteful number, since it uses less digits than its factorization.

172274436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4785411 (or 4785406 counting only the distinct ones).

The product of its digits is 56448, while the sum is 36.

The square root of 172274436 is about 13125.3356528509. The cubic root of 172274436 is about 556.4253986111.

The spelling of 172274436 in words is "one hundred seventy-two million, two hundred seventy-four thousand, four hundred thirty-six".