72190345 has 16 divisors (see below), whose sum is σ = 87816960. Its totient is φ = 56966400.

The previous prime is 72190337. The next prime is 72190387. The reversal of 72190345 is 54309127.

It is not a de Polignac number, because 72190345 - 2³ = 72190337 is a prime.

It is a super-2 number, since 2×72190345² = 10422891822438050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167280 + ... + 167710.

It is an arithmetic number, because the mean of its divisors is an integer number (5488560).

Almost surely, 2^72190345 is an apocalyptic number.

It is an amenable number.

72190345 is a deficient number, since it is larger than the sum of its proper divisors (15626615).

72190345 is a wasteful number, since it uses less digits than its factorization.

72190345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 72190345 is about 8496.4901577063. The cubic root of 72190345 is about 416.3830471655.

The spelling of 72190345 in words is "seventy-two million, one hundred ninety thousand, three hundred forty-five".