745037640 has 48 divisors (see below), whose sum is σ = 2421373500. Its totient is φ = 198676608.

The previous prime is 745037627. The next prime is 745037659. The reversal of 745037640 is 46730547.

745037640 is a `hidden beast` number, since 7 + 4 + 5 + 0 + 3 + 7 + 640 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 711929124 + 33108516 = 26682^2 + 5754^2 .

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 = 745037595 and 745037604.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1034415 + ... + 1035134.

Almost surely, 2^745037640 is an apocalyptic number.

It is an amenable number.

745037640 is an abundant number, since it is smaller than the sum of its proper divisors (1676335860).

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

745037640 is a wasteful number, since it uses less digits than its factorization.

745037640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069566 (or 2069559 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 36.

The square root of 745037640 is about 27295.3776306539. The cubic root of 745037640 is about 906.5520370026.

The spelling of 745037640 in words is "seven hundred forty-five million, thirty-seven thousand, six hundred forty".