745139328 has 64 divisors (see below), whose sum is σ = 2001607200. Its totient is φ = 245577728.

The previous prime is 745139309. The next prime is 745139357. The reversal of 745139328 is 823931547.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 745139328.

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 7 ways as a sum of consecutive naturals, for example, 23275 + ... + 45077.

Almost surely, 2^745139328 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 745139328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1000803600).

745139328 is an abundant number, since it is smaller than the sum of its proper divisors (1256467872).

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

745139328 is a wasteful number, since it uses less digits than its factorization.

745139328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21909 (or 21897 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 745139328 is about 27297.2403000743. The cubic root of 745139328 is about 906.5932793349.

The spelling of 745139328 in words is "seven hundred forty-five million, one hundred thirty-nine thousand, three hundred twenty-eight".