74609988 has 24 divisors (see below), whose sum is σ = 178139808. Its totient is φ = 24291456.

The previous prime is 74609987. The next prime is 74609993. The reversal of 74609988 is 88990647.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 74609988.

It is not an unprimeable number, because it can be changed into a prime (74609987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71781 + ... + 72812.

It is an arithmetic number, because the mean of its divisors is an integer number (7422492).

Almost surely, 2^74609988 is an apocalyptic number.

It is an amenable number.

74609988 is an abundant number, since it is smaller than the sum of its proper divisors (103529820).

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

74609988 is a wasteful number, since it uses less digits than its factorization.

74609988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144643 (or 144641 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 74609988 is about 8637.7073347040. The cubic root of 74609988 is about 420.9840644081.

The spelling of 74609988 in words is "seventy-four million, six hundred nine thousand, nine hundred eighty-eight".