74291636 has 6 divisors (see below), whose sum is σ = 130010370. Its totient is φ = 37145816.

The previous prime is 74291629. The next prime is 74291639. The reversal of 74291636 is 63619247.

It can be written as a sum of positive squares in only one way, i.e., 40883236 + 33408400 = 6394^2 + 5780^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 74291636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74291639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9286451 + ... + 9286458.

It is an arithmetic number, because the mean of its divisors is an integer number (21668395).

Almost surely, 2^74291636 is an apocalyptic number.

It is an amenable number.

74291636 is a deficient number, since it is larger than the sum of its proper divisors (55718734).

74291636 is a wasteful number, since it uses less digits than its factorization.

74291636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18572913 (or 18572911 counting only the distinct ones).

The product of its digits is 54432, while the sum is 38.

The square root of 74291636 is about 8619.2595969724. The cubic root of 74291636 is about 420.3844476855.

The spelling of 74291636 in words is "seventy-four million, two hundred ninety-one thousand, six hundred thirty-six".