745640448 has 120 divisors (see below), whose sum is σ = 2310981552. Its totient is φ = 213018624.

The previous prime is 745640437. The next prime is 745640449. The reversal of 745640448 is 844046547.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (745640449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70311 + ... + 80217.

Almost surely, 2^745640448 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 745640448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1155490776).

745640448 is an abundant number, since it is smaller than the sum of its proper divisors (1565341104).

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

745640448 is an equidigital number, since it uses as much as digits as its factorization.

745640448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9942 (or 9919 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 42.

The square root of 745640448 is about 27306.4177071984. The cubic root of 745640448 is about 906.7964673834.

The spelling of 745640448 in words is "seven hundred forty-five million, six hundred forty thousand, four hundred forty-eight".