74544720 has 80 divisors (see below), whose sum is σ = 232163712. Its totient is φ = 19786240.

The previous prime is 74544719. The next prime is 74544721. The reversal of 74544720 is 2744547.

It is an interprime number because it is at equal distance from previous prime (74544719) and next prime (74544721).

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74544721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62530 + ... + 63710.

Almost surely, 2^74544720 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 74544720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116081856).

74544720 is an abundant number, since it is smaller than the sum of its proper divisors (157618992).

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

74544720 is a wasteful number, since it uses less digits than its factorization.

74544720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460 (or 1454 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 33.

The square root of 74544720 is about 8633.9284222189. The cubic root of 74544720 is about 420.8612711795.

The spelling of 74544720 in words is "seventy-four million, five hundred forty-four thousand, seven hundred twenty".