749439940 has 12 divisors (see below), whose sum is σ = 1573823916. Its totient is φ = 299775968.

The previous prime is 749439937. The next prime is 749439941. The reversal of 749439940 is 49934947.

749439940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 84934656 + 664505284 = 9216^2 + 25778^2 .

It is not an unprimeable number, because it can be changed into a prime (749439941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18735979 + ... + 18736018.

It is an arithmetic number, because the mean of its divisors is an integer number (131151993).

Almost surely, 2^749439940 is an apocalyptic number.

It is an amenable number.

749439940 is an abundant number, since it is smaller than the sum of its proper divisors (824383976).

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

749439940 is a wasteful number, since it uses less digits than its factorization.

749439940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37472006 (or 37472004 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 49.

The square root of 749439940 is about 27375.9007157755. The cubic root of 749439940 is about 908.3340853083.

Subtracting from 749439940 its product of nonzero digits (979776), we obtain a square (748460164 = 27358²).

The spelling of 749439940 in words is "seven hundred forty-nine million, four hundred thirty-nine thousand, nine hundred forty".