445427172 has 18 divisors (see below), whose sum is σ = 1125940998. Its totient is φ = 148475712.

The previous prime is 445427159. The next prime is 445427179. The reversal of 445427172 is 271724544.

445427172 is a `hidden beast` number, since 44 + 542 + 7 + 1 + 72 = 666.

It can be written as a sum of positive squares in only one way, i.e., 420086016 + 25341156 = 20496^2 + 5034^2 .

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: 12372977 = 445427172 / (4 + 4 + 5 + 4 + 2 + 7 + 1 + 7 + 2).

It is not an unprimeable number, because it can be changed into a prime (445427179) 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, 6186453 + ... + 6186524.

Almost surely, 2^445427172 is an apocalyptic number.

It is an amenable number.

445427172 is an abundant number, since it is smaller than the sum of its proper divisors (680513826).

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

445427172 is a wasteful number, since it uses less digits than its factorization.

445427172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12372987 (or 12372982 counting only the distinct ones).

The product of its digits is 62720, while the sum is 36.

The square root of 445427172 is about 21105.1456284954. The cubic root of 445427172 is about 763.7048854252.

It can be divided in two parts, 4454 and 27172, that added together give a triangular number (31626 = T₂₅₁).

The spelling of 445427172 in words is "four hundred forty-five million, four hundred twenty-seven thousand, one hundred seventy-two".