744545520 has 200 divisors, whose sum is σ = 2616997680. Its totient is φ = 196162560.

The previous prime is 744545479. The next prime is 744545521. The reversal of 744545520 is 25545447.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744545521) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 576075 + ... + 577365.

Almost surely, 2^744545520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 744545520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1308498840).

744545520 is an abundant number, since it is smaller than the sum of its proper divisors (1872452160).

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

744545520 is a wasteful number, since it uses less digits than its factorization.

744545520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405 (or 1390 counting only the distinct ones).

The product of its (nonzero) digits is 112000, while the sum is 36.

The square root of 744545520 is about 27286.3614283766. The cubic root of 744545520 is about 906.3523913165.

The spelling of 744545520 in words is "seven hundred forty-four million, five hundred forty-five thousand, five hundred twenty".