745913640 has 128 divisors (see below), whose sum is σ = 2338502400. Its totient is φ = 190095360.

The previous prime is 745913639. The next prime is 745913653. The reversal of 745913640 is 46319547.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 357400 + ... + 359480.

It is an arithmetic number, because the mean of its divisors is an integer number (18269550).

Almost surely, 2^745913640 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 745913640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1169251200).

745913640 is an abundant number, since it is smaller than the sum of its proper divisors (1592588760).

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

745913640 is a wasteful number, since it uses less digits than its factorization.

745913640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2227 (or 2223 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 745913640 is about 27311.4195896149. The cubic root of 745913640 is about 906.9071996148.

The spelling of 745913640 in words is "seven hundred forty-five million, nine hundred thirteen thousand, six hundred forty".