745628544 has 128 divisors (see below), whose sum is σ = 2229312000. Its totient is φ = 245306880.

The previous prime is 745628531. The next prime is 745628549. The reversal of 745628544 is 445826547.

745628544 is a `hidden beast` number, since 7 + 4 + 562 + 85 + 4 + 4 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 745628544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745628549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271659 + ... + 274389.

It is an arithmetic number, because the mean of its divisors is an integer number (17416500).

Almost surely, 2^745628544 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 745628544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1114656000).

745628544 is an abundant number, since it is smaller than the sum of its proper divisors (1483683456).

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

745628544 is a wasteful number, since it uses less digits than its factorization.

745628544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2833 (or 2815 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 45.

The square root of 745628544 is about 27306.1997355912. The cubic root of 745628544 is about 906.7916417499.

The spelling of 745628544 in words is "seven hundred forty-five million, six hundred twenty-eight thousand, five hundred forty-four".