745865730 has 48 divisors (see below), whose sum is σ = 1943565624. Its totient is φ = 198455040.

The previous prime is 745865711. The next prime is 745865737. The reversal of 745865730 is 37568547.

745865730 is a `hidden beast` number, since 74 + 5 + 8 + 6 + 573 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 540144081 + 205721649 = 23241^2 + 14343^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (745865737) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32502 + ... + 50478.

Almost surely, 2^745865730 is an apocalyptic number.

745865730 is an abundant number, since it is smaller than the sum of its proper divisors (1197699894).

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

745865730 is a wasteful number, since it uses less digits than its factorization.

745865730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18451 (or 18448 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The square root of 745865730 is about 27310.5424698961. The cubic root of 745865730 is about 906.8877823294.

The spelling of 745865730 in words is "seven hundred forty-five million, eight hundred sixty-five thousand, seven hundred thirty".