745840680 has 128 divisors (see below), whose sum is σ = 2431537920. Its totient is φ = 181923840.

The previous prime is 745840651. The next prime is 745840691. The reversal of 745840680 is 86048547.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 174165 + ... + 178395.

It is an arithmetic number, because the mean of its divisors is an integer number (18996390).

Almost surely, 2^745840680 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 745840680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1215768960).

745840680 is an abundant number, since it is smaller than the sum of its proper divisors (1685697240).

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

745840680 is a wasteful number, since it uses less digits than its factorization.

745840680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4371 (or 4367 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The square root of 745840680 is about 27310.0838519401. The cubic root of 745840680 is about 906.8776295667.

The spelling of 745840680 in words is "seven hundred forty-five million, eight hundred forty thousand, six hundred eighty".