745891722 has 12 divisors (see below), whose sum is σ = 1616098770. Its totient is φ = 248630568.

The previous prime is 745891709. The next prime is 745891723. The reversal of 745891722 is 227198547.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 696484881 + 49406841 = 26391^2 + 7029^2 .

It is not an unprimeable number, because it can be changed into a prime (745891723) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20719197 + ... + 20719232.

Almost surely, 2^745891722 is an apocalyptic number.

745891722 is an abundant number, since it is smaller than the sum of its proper divisors (870207048).

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

745891722 is a wasteful number, since it uses less digits than its factorization.

745891722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41438437 (or 41438434 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 745891722 is about 27311.0183259431. The cubic root of 745891722 is about 906.8983166443.

The spelling of 745891722 in words is "seven hundred forty-five million, eight hundred ninety-one thousand, seven hundred twenty-two".