72741636 has 36 divisors (see below), whose sum is σ = 200591664. Its totient is φ = 22042800.

The previous prime is 72741601. The next prime is 72741637. The reversal of 72741636 is 63614727.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is a self number, because there is not a number n which added to its sum of digits gives 72741636.

It is not an unprimeable number, because it can be changed into a prime (72741637) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91450 + ... + 92241.

Almost surely, 2^72741636 is an apocalyptic number.

It is an amenable number.

72741636 is an abundant number, since it is smaller than the sum of its proper divisors (127850028).

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

72741636 is a wasteful number, since it uses less digits than its factorization.

72741636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183712 (or 183707 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The square root of 72741636 is about 8528.8707341594. The cubic root of 72741636 is about 417.4402816565.

The spelling of 72741636 in words is "seventy-two million, seven hundred forty-one thousand, six hundred thirty-six".