74399888 has 30 divisors (see below), whose sum is σ = 152921574. Its totient is φ = 34944768.

The previous prime is 74399881. The next prime is 74399891. The reversal of 74399888 is 88899347.

It can be written as a sum of positive squares in only one way, i.e., 70023424 + 4376464 = 8368^2 + 2092^2 .

It is not an unprimeable number, because it can be changed into a prime (74399881) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 141995 + ... + 142517.

Almost surely, 2^74399888 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 74399888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76460787).

74399888 is an abundant number, since it is smaller than the sum of its proper divisors (78521686).

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

74399888 is an equidigital number, since it uses as much as digits as its factorization.

74399888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071 (or 542 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 56.

The square root of 74399888 is about 8625.5369687921. The cubic root of 74399888 is about 420.5885324441.

The spelling of 74399888 in words is "seventy-four million, three hundred ninety-nine thousand, eight hundred eighty-eight".