74561720 has 16 divisors (see below), whose sum is σ = 167763960. Its totient is φ = 29824672.

The previous prime is 74561717. The next prime is 74561731. The reversal of 74561720 is 2716547.

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 3 ways as a sum of consecutive naturals, for example, 931982 + ... + 932061.

Almost surely, 2^74561720 is an apocalyptic number.

It is an amenable number.

74561720 is an abundant number, since it is smaller than the sum of its proper divisors (93202240).

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

74561720 is a wasteful number, since it uses less digits than its factorization.

74561720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1864054 (or 1864050 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 74561720 is about 8634.9128542215. The cubic root of 74561720 is about 420.8932613629.

The spelling of 74561720 in words is "seventy-four million, five hundred sixty-one thousand, seven hundred twenty".