72061136 has 20 divisors (see below), whose sum is σ = 159564192. Its totient is φ = 30883296.

The previous prime is 72061133. The next prime is 72061141. The reversal of 72061136 is 63116027.

It is a super-2 number, since 2×72061136² = 10385614643220992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72061133) 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, 321590 + ... + 321813.

Almost surely, 2^72061136 is an apocalyptic number.

It is an amenable number.

72061136 is an abundant number, since it is smaller than the sum of its proper divisors (87503056).

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

72061136 is a wasteful number, since it uses less digits than its factorization.

72061136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643418 (or 643412 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 72061136 is about 8488.8830831859. The cubic root of 72061136 is about 416.1344794514.

The spelling of 72061136 in words is "seventy-two million, sixty-one thousand, one hundred thirty-six".