74290724 has 6 divisors (see below), whose sum is σ = 130008774. Its totient is φ = 37145360.

The previous prime is 74290717. The next prime is 74290751. The reversal of 74290724 is 42709247.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 73650724 + 640000 = 8582^2 + 800^2 .

It is a super-2 number, since 2×74290724² = 11038223344888352, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9286337 + ... + 9286344.

It is an arithmetic number, because the mean of its divisors is an integer number (21668129).

Almost surely, 2^74290724 is an apocalyptic number.

It is an amenable number.

74290724 is a deficient number, since it is larger than the sum of its proper divisors (55718050).

74290724 is a wasteful number, since it uses less digits than its factorization.

74290724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18572685 (or 18572683 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 74290724 is about 8619.2066920338. The cubic root of 74290724 is about 420.3827274730.

The spelling of 74290724 in words is "seventy-four million, two hundred ninety thousand, seven hundred twenty-four".