72974636 has 24 divisors (see below), whose sum is σ = 146531616. Its totient is φ = 31150080.

The previous prime is 72974599. The next prime is 72974639. The reversal of 72974636 is 63647927.

It is a happy number.

It is a super-5 number, since 5×72974636⁵ (a number of 41 digits) contains 55555 as substring.

It is not an unprimeable number, because it can be changed into a prime (72974639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2126 + ... + 12266.

It is an arithmetic number, because the mean of its divisors is an integer number (6105484).

Almost surely, 2^72974636 is an apocalyptic number.

It is an amenable number.

72974636 is an abundant number, since it is smaller than the sum of its proper divisors (73556980).

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

72974636 is a wasteful number, since it uses less digits than its factorization.

72974636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10409 (or 10407 counting only the distinct ones).

The product of its digits is 381024, while the sum is 44.

The square root of 72974636 is about 8542.5193005342. The cubic root of 72974636 is about 417.8855100313.

It can be divided in two parts, 72974 and 636, that multiplied together give a palindrome (46411464).

The spelling of 72974636 in words is "seventy-two million, nine hundred seventy-four thousand, six hundred thirty-six".