74021328 has 60 divisors (see below), whose sum is σ = 209036100. Its totient is φ = 24450048.

The previous prime is 74021323. The next prime is 74021347. The reversal of 74021328 is 82312047.

It can be written as a sum of positive squares in 2 ways, for example, as 22353984 + 51667344 = 4728^2 + 7188^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74021323) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 13998 + ... + 18546.

It is an arithmetic number, because the mean of its divisors is an integer number (3483935).

Almost surely, 2^74021328 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 74021328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104518050).

74021328 is an abundant number, since it is smaller than the sum of its proper divisors (135014772).

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

74021328 is a wasteful number, since it uses less digits than its factorization.

74021328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4676 (or 4667 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 74021328 is about 8603.5648425522. The cubic root of 74021328 is about 419.8739757947.

The spelling of 74021328 in words is "seventy-four million, twenty-one thousand, three hundred twenty-eight".