74284520 has 16 divisors (see below), whose sum is σ = 167140260. Its totient is φ = 29713792.

The previous prime is 74284513. The next prime is 74284523. The reversal of 74284520 is 2548247.

It can be written as a sum of positive squares in 2 ways, for example, as 68591524 + 5692996 = 8282^2 + 2386^2 .

It is not an unprimeable number, because it can be changed into a prime (74284523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 928517 + ... + 928596.

Almost surely, 2^74284520 is an apocalyptic number.

It is an amenable number.

74284520 is an abundant number, since it is smaller than the sum of its proper divisors (92855740).

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

74284520 is a wasteful number, since it uses less digits than its factorization.

74284520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857124 (or 1857120 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 74284520 is about 8618.8467906095. The cubic root of 74284520 is about 420.3710251281.

The spelling of 74284520 in words is "seventy-four million, two hundred eighty-four thousand, five hundred twenty".