74386688 has 36 divisors (see below), whose sum is σ = 149160900. Its totient is φ = 37023744.

The previous prime is 74386661. The next prime is 74386699. The reversal of 74386688 is 88668347.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 41576704 + 32809984 = 6448^2 + 5728^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70388 + ... + 71436.

Almost surely, 2^74386688 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 74386688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74580450).

74386688 is an abundant number, since it is smaller than the sum of its proper divisors (74774212).

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

74386688 is a wasteful number, since it uses less digits than its factorization.

74386688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342 (or 1328 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 50.

The square root of 74386688 is about 8624.7717650962. The cubic root of 74386688 is about 420.5636574201.

The spelling of 74386688 in words is "seventy-four million, three hundred eighty-six thousand, six hundred eighty-eight".