74188816 has 40 divisors (see below), whose sum is σ = 163911384. Its totient is φ = 32225280.

The previous prime is 74188813. The next prime is 74188819. The reversal of 74188816 is 61888147.

It is an interprime number because it is at equal distance from previous prime (74188813) and next prime (74188819).

It can be written as a sum of positive squares in 4 ways, for example, as 8643600 + 65545216 = 2940^2 + 8096^2 .

It is not an unprimeable number, because it can be changed into a prime (74188813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6955 + ... + 14026.

Almost surely, 2^74188816 is an apocalyptic number.

It is an amenable number.

74188816 is an abundant number, since it is smaller than the sum of its proper divisors (89722568).

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

74188816 is a wasteful number, since it uses less digits than its factorization.

74188816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21019 (or 21013 counting only the distinct ones).

The product of its digits is 86016, while the sum is 43.

The square root of 74188816 is about 8613.2929823616. The cubic root of 74188816 is about 420.1904200789.

The spelling of 74188816 in words is "seventy-four million, one hundred eighty-eight thousand, eight hundred sixteen".