745138380 has 48 divisors (see below), whose sum is σ = 2384444160. Its totient is φ = 170317248.

The previous prime is 745138379. The next prime is 745138391. The reversal of 745138380 is 83831547.

745138380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 886650 + ... + 887489.

It is an arithmetic number, because the mean of its divisors is an integer number (49675920).

Almost surely, 2^745138380 is an apocalyptic number.

745138380 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

745138380 is an abundant number, since it is smaller than the sum of its proper divisors (1639305780).

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

745138380 is a wasteful number, since it uses less digits than its factorization.

745138380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774158 (or 1774156 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 745138380 is about 27297.2229356761. Note that the first 3 decimals coincide. The cubic root of 745138380 is about 906.5928948651.

The spelling of 745138380 in words is "seven hundred forty-five million, one hundred thirty-eight thousand, three hundred eighty".