745440384 has 128 divisors (see below), whose sum is σ = 2201633280. Its totient is φ = 221921280.

The previous prime is 745440383. The next prime is 745440401. The reversal of 745440384 is 483044547.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (745440383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152344 + ... + 157160.

It is an arithmetic number, because the mean of its divisors is an integer number (17200260).

Almost surely, 2^745440384 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 745440384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1100816640).

745440384 is an abundant number, since it is smaller than the sum of its proper divisors (1456192896).

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

745440384 is a wasteful number, since it uses less digits than its factorization.

745440384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4878 (or 4866 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 39.

The square root of 745440384 is about 27302.7541467889. The cubic root of 745440384 is about 906.7153587844.

The spelling of 745440384 in words is "seven hundred forty-five million, four hundred forty thousand, three hundred eighty-four".