744284920 has 16 divisors (see below), whose sum is σ = 1674641160. Its totient is φ = 297713952.

The previous prime is 744284909. The next prime is 744284923. The reversal of 744284920 is 29482447.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 18607123 = 744284920 / (7 + 4 + 4 + 2 + 8 + 4 + 9 + 2 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744284923) 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, 9303522 + ... + 9303601.

Almost surely, 2^744284920 is an apocalyptic number.

It is an amenable number.

744284920 is an abundant number, since it is smaller than the sum of its proper divisors (930356240).

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

744284920 is a wasteful number, since it uses less digits than its factorization.

744284920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18607134 (or 18607130 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 744284920 is about 27281.5857310384. The cubic root of 744284920 is about 906.2466341849.

The spelling of 744284920 in words is "seven hundred forty-four million, two hundred eighty-four thousand, nine hundred twenty".