74636544 has 72 divisors (see below), whose sum is σ = 200230240. Its totient is φ = 24680448.

The previous prime is 74636543. The next prime is 74636567. The reversal of 74636544 is 44563647.

It is a happy number.

It is a super-2 number, since 2×74636544² = 11141227400527872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74636543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120267 + ... + 120885.

Almost surely, 2^74636544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74636544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100115120).

74636544 is an abundant number, since it is smaller than the sum of its proper divisors (125593696).

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

74636544 is a wasteful number, since it uses less digits than its factorization.

74636544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795 (or 781 counting only the distinct ones).

The product of its digits is 241920, while the sum is 39.

The square root of 74636544 is about 8639.2444114054. The cubic root of 74636544 is about 421.0340055620.

The spelling of 74636544 in words is "seventy-four million, six hundred thirty-six thousand, five hundred forty-four".