74913280 has 80 divisors (see below), whose sum is σ = 193518864. Its totient is φ = 27648000.

The previous prime is 74913263. The next prime is 74913281. The reversal of 74913280 is 8231947.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×74913280² = 11223999040716800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74913281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32155 + ... + 34405.

Almost surely, 2^74913280 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 74913280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96759432).

74913280 is an abundant number, since it is smaller than the sum of its proper divisors (118605584).

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

74913280 is a wasteful number, since it uses less digits than its factorization.

74913280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2287 (or 2271 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 74913280 is about 8655.2458081790. The cubic root of 74913280 is about 421.5537311184.

The spelling of 74913280 in words is "seventy-four million, nine hundred thirteen thousand, two hundred eighty".