74319720 has 32 divisors (see below), whose sum is σ = 222959520. Its totient is φ = 19818560.

The previous prime is 74319719. The next prime is 74319731. The reversal of 74319720 is 2791347.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309546 + ... + 309785.

It is an arithmetic number, because the mean of its divisors is an integer number (6967485).

Almost surely, 2^74319720 is an apocalyptic number.

It is an amenable number.

74319720 is an abundant number, since it is smaller than the sum of its proper divisors (148639800).

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

74319720 is a wasteful number, since it uses less digits than its factorization.

74319720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619345 (or 619341 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 74319720 is about 8620.8885852910. Note that the first 3 decimals coincide. The cubic root of 74319720 is about 420.4374127751.

The spelling of 74319720 in words is "seventy-four million, three hundred nineteen thousand, seven hundred twenty".