74689220 has 24 divisors (see below), whose sum is σ = 158999064. Its totient is φ = 29465856.

The previous prime is 74689217. The next prime is 74689229. The reversal of 74689220 is 2298647.

It can be written as a sum of positive squares in 4 ways, for example, as 31629376 + 43059844 = 5624^2 + 6562^2 .

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (74689229) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 24119 + ... + 27038.

It is an arithmetic number, because the mean of its divisors is an integer number (6624961).

Almost surely, 2^74689220 is an apocalyptic number.

It is an amenable number.

74689220 is an abundant number, since it is smaller than the sum of its proper divisors (84309844).

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

74689220 is a wasteful number, since it uses less digits than its factorization.

74689220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51239 (or 51237 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 74689220 is about 8642.2925199278. The cubic root of 74689220 is about 421.1330328863.

The spelling of 74689220 in words is "seventy-four million, six hundred eighty-nine thousand, two hundred twenty".