74742624 has 72 divisors (see below), whose sum is σ = 231881832. Its totient is φ = 22648320.

The previous prime is 74742601. The next prime is 74742641. The reversal of 74742624 is 42624747.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a zygodrome in base 6.

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 11 ways as a sum of consecutive naturals, for example, 8629 + ... + 14964.

It is an arithmetic number, because the mean of its divisors is an integer number (3220581).

Almost surely, 2^74742624 is an apocalyptic number.

It is an amenable number.

74742624 is an abundant number, since it is smaller than the sum of its proper divisors (157139208).

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

74742624 is a wasteful number, since it uses less digits than its factorization.

74742624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23620 (or 23609 counting only the distinct ones).

The product of its digits is 75264, while the sum is 36.

The square root of 74742624 is about 8645.3816572781. The cubic root of 74742624 is about 421.2333812825.

The spelling of 74742624 in words is "seventy-four million, seven hundred forty-two thousand, six hundred twenty-four".