744697440 has 72 divisors (see below), whose sum is σ = 2541284928. Its totient is φ = 198585600.

The previous prime is 744697433. The next prime is 744697453. The reversal of 744697440 is 44796447.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 257136 + ... + 260015.

It is an arithmetic number, because the mean of its divisors is an integer number (35295624).

Almost surely, 2^744697440 is an apocalyptic number.

It is an amenable number.

744697440 is an abundant number, since it is smaller than the sum of its proper divisors (1796587488).

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

744697440 is a wasteful number, since it uses less digits than its factorization.

744697440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517172 (or 517161 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 45.

The square root of 744697440 is about 27289.1450947075. The cubic root of 744697440 is about 906.4140323613.

The spelling of 744697440 in words is "seven hundred forty-four million, six hundred ninety-seven thousand, four hundred forty".