74665728 has 108 divisors (see below), whose sum is σ = 224799120. Its totient is φ = 23789568.

The previous prime is 74665727. The next prime is 74665729. The reversal of 74665728 is 82756647.

74665728 is a `hidden beast` number, since 74 + 6 + 6 + 572 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (74665727) and next prime (74665729).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74665727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52288 + ... + 53696.

Almost surely, 2^74665728 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 74665728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112399560).

74665728 is an abundant number, since it is smaller than the sum of its proper divisors (150133392).

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

74665728 is a wasteful number, since it uses less digits than its factorization.

74665728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454 (or 1437 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 74665728 is about 8640.9332829273. The cubic root of 74665728 is about 421.0888752661.

The spelling of 74665728 in words is "seventy-four million, six hundred sixty-five thousand, seven hundred twenty-eight".