72167236 has 12 divisors (see below), whose sum is σ = 126529900. Its totient is φ = 36015840.

The previous prime is 72167219. The next prime is 72167237. The reversal of 72167236 is 63276127.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 53934336 + 18232900 = 7344^2 + 4270^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (72167237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14511 + ... + 18838.

Almost surely, 2^72167236 is an apocalyptic number.

It is an amenable number.

72167236 is a deficient number, since it is larger than the sum of its proper divisors (54362664).

72167236 is a wasteful number, since it uses less digits than its factorization.

72167236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33894 (or 33892 counting only the distinct ones).

The product of its digits is 21168, while the sum is 34.

The square root of 72167236 is about 8495.1301343770. The cubic root of 72167236 is about 416.3386126790.

The spelling of 72167236 in words is "seventy-two million, one hundred sixty-seven thousand, two hundred thirty-six".