74531280 has 40 divisors (see below), whose sum is σ = 231047712. Its totient is φ = 19874944.

The previous prime is 74531279. The next prime is 74531287. The reversal of 74531280 is 8213547.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74531287) 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, 155034 + ... + 155513.

Almost surely, 2^74531280 is an apocalyptic number.

It is an amenable number.

74531280 is an abundant number, since it is smaller than the sum of its proper divisors (156516432).

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

74531280 is a wasteful number, since it uses less digits than its factorization.

74531280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310563 (or 310557 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 74531280 is about 8633.1500624048. The cubic root of 74531280 is about 420.8359766741.

The spelling of 74531280 in words is "seventy-four million, five hundred thirty-one thousand, two hundred eighty".