745701840 has 120 divisors (see below), whose sum is σ = 2696988840. Its totient is φ = 183555072.

The previous prime is 745701833. The next prime is 745701851. The reversal of 745701840 is 48107547.

745701840 is a `hidden beast` number, since 7 + 4 + 570 + 1 + 84 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 14107536 + 731594304 = 3756^2 + 27048^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 745701795 and 745701804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30475 + ... + 49194.

It is an arithmetic number, because the mean of its divisors is an integer number (22474907).

Almost surely, 2^745701840 is an apocalyptic number.

It is an amenable number.

745701840 is an abundant number, since it is smaller than the sum of its proper divisors (1951287000).

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

745701840 is a wasteful number, since it uses less digits than its factorization.

745701840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79701 (or 79692 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The square root of 745701840 is about 27307.5418154033. The cubic root of 745701840 is about 906.8213536053.

The spelling of 745701840 in words is "seven hundred forty-five million, seven hundred one thousand, eight hundred forty".