744809640 has 32 divisors (see below), whose sum is σ = 2234429280. Its totient is φ = 198615872.

The previous prime is 744809591. The next prime is 744809647. The reversal of 744809640 is 46908447.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 744809592 and 744809601.

It is not an unprimeable number, because it can be changed into a prime (744809647) by changing a digit.

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, 3103254 + ... + 3103493.

It is an arithmetic number, because the mean of its divisors is an integer number (69825915).

Almost surely, 2^744809640 is an apocalyptic number.

It is an amenable number.

744809640 is an abundant number, since it is smaller than the sum of its proper divisors (1489619640).

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

744809640 is a wasteful number, since it uses less digits than its factorization.

744809640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6206761 (or 6206757 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 744809640 is about 27291.2007797385. The cubic root of 744809640 is about 906.4595517637.

The spelling of 744809640 in words is "seven hundred forty-four million, eight hundred nine thousand, six hundred forty".