744557940 has 288 divisors, whose sum is σ = 2838326400. Its totient is φ = 161118720.

The previous prime is 744557927. The next prime is 744557941. The reversal of 744557940 is 49755447.

744557940 is a `hidden beast` number, since 7 + 4 + 4 + 557 + 94 + 0 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744557941) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 502000 + ... + 503480.

It is an arithmetic number, because the mean of its divisors is an integer number (9855300).

Almost surely, 2^744557940 is an apocalyptic number.

744557940 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 744557940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1419163200).

744557940 is an abundant number, since it is smaller than the sum of its proper divisors (2093768460).

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

744557940 is a wasteful number, since it uses less digits than its factorization.

744557940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532 (or 1517 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The square root of 744557940 is about 27286.5890136528. The cubic root of 744557940 is about 906.3574310057.

The spelling of 744557940 in words is "seven hundred forty-four million, five hundred fifty-seven thousand, nine hundred forty".