745407820 has 24 divisors (see below), whose sum is σ = 1568047824. Its totient is φ = 297650496.

The previous prime is 745407787. The next prime is 745407833. The reversal of 745407820 is 28704547.

It is a self number, because there is not a number n which added to its sum of digits gives 745407820.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20007 + ... + 43486.

It is an arithmetic number, because the mean of its divisors is an integer number (65335326).

Almost surely, 2^745407820 is an apocalyptic number.

It is an amenable number.

745407820 is an abundant number, since it is smaller than the sum of its proper divisors (822640004).

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

745407820 is a wasteful number, since it uses less digits than its factorization.

745407820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64089 (or 64087 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 745407820 is about 27302.1577901821. The cubic root of 745407820 is about 906.7021555337.

The spelling of 745407820 in words is "seven hundred forty-five million, four hundred seven thousand, eight hundred twenty".