72204345 has 32 divisors (see below), whose sum is σ = 132796800. Its totient is φ = 37179072.

The previous prime is 72204281. The next prime is 72204347. The reversal of 72204345 is 54340227.

72204345 is a `hidden beast` number, since 7 + 220 + 434 + 5 = 666.

It is not a de Polignac number, because 72204345 - 2⁶ = 72204281 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (72204347) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 5307 + ... + 13136.

It is an arithmetic number, because the mean of its divisors is an integer number (4149900).

Almost surely, 2^72204345 is an apocalyptic number.

It is an amenable number.

72204345 is a deficient number, since it is larger than the sum of its proper divisors (60592455).

72204345 is a wasteful number, since it uses less digits than its factorization.

72204345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18486 (or 18480 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 72204345 is about 8497.3139873727. The cubic root of 72204345 is about 416.4099620568.

The spelling of 72204345 in words is "seventy-two million, two hundred four thousand, three hundred forty-five".