74399988 has 48 divisors (see below), whose sum is σ = 189351680. Its totient is φ = 22598784.

The previous prime is 74399959. The next prime is 74399999. The reversal of 74399988 is 88999347.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9306 + ... + 15342.

Almost surely, 2^74399988 is an apocalyptic number.

74399988 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74399988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94675840).

74399988 is an abundant number, since it is smaller than the sum of its proper divisors (114951692).

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

74399988 is a wasteful number, since it uses less digits than its factorization.

74399988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6136 (or 6134 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 57.

The square root of 74399988 is about 8625.5427655308. The cubic root of 74399988 is about 420.5887208800.

The spelling of 74399988 in words is "seventy-four million, three hundred ninety-nine thousand, nine hundred eighty-eight".