744640536 has 16 divisors (see below), whose sum is σ = 1861601400. Its totient is φ = 248213504.

The previous prime is 744640531. The next prime is 744640573. The reversal of 744640536 is 635046447.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 744640494 and 744640503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744640531) 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, 15513321 + ... + 15513368.

Almost surely, 2^744640536 is an apocalyptic number.

It is an amenable number.

744640536 is an abundant number, since it is smaller than the sum of its proper divisors (1116960864).

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

744640536 is a wasteful number, since it uses less digits than its factorization.

744640536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31026698 (or 31026694 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 39.

The square root of 744640536 is about 27288.1024624286. The cubic root of 744640536 is about 906.3909447308.

The spelling of 744640536 in words is "seven hundred forty-four million, six hundred forty thousand, five hundred thirty-six".