74772720 has 200 divisors, whose sum is σ = 283575600. Its totient is φ = 18109440.

The previous prime is 74772697. The next prime is 74772739. The reversal of 74772720 is 2727747.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 70756 + ... + 71804.

It is an arithmetic number, because the mean of its divisors is an integer number (1417878).

Almost surely, 2^74772720 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 74772720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141787800).

74772720 is an abundant number, since it is smaller than the sum of its proper divisors (208802880).

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

74772720 is a wasteful number, since it uses less digits than its factorization.

74772720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085 (or 1070 counting only the distinct ones).

The product of its (nonzero) digits is 38416, while the sum is 36.

The square root of 74772720 is about 8647.1220645947. The cubic root of 74772720 is about 421.2899118937.

It can be divided in two parts, 747727 and 20, that added together give a palindrome (747747).

The spelling of 74772720 in words is "seventy-four million, seven hundred seventy-two thousand, seven hundred twenty".