74505720 has 64 divisors (see below), whose sum is σ = 224745120. Its totient is φ = 19759104.

The previous prime is 74505719. The next prime is 74505749. The reversal of 74505720 is 2750547.

It is a super-2 number, since 2×74505720² = 11102204625436800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21552 + ... + 24768.

Almost surely, 2^74505720 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 74505720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112372560).

74505720 is an abundant number, since it is smaller than the sum of its proper divisors (150239400).

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

74505720 is a wasteful number, since it uses less digits than its factorization.

74505720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3424 (or 3420 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 74505720 is about 8631.6695951594. The cubic root of 74505720 is about 420.7878635534.

The spelling of 74505720 in words is "seventy-four million, five hundred five thousand, seven hundred twenty".