722257305 has 96 divisors (see below), whose sum is σ = 1478424960. Its totient is φ = 297722880.

The previous prime is 722257259. The next prime is 722257309. The reversal of 722257305 is 503752227.

It is not a de Polignac number, because 722257305 - 2¹⁵ = 722224537 is a prime.

It is a super-2 number, since 2×722257305² = 1043311229251726050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (722257309) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1269061 + ... + 1269629.

It is an arithmetic number, because the mean of its divisors is an integer number (15400260).

Almost surely, 2^722257305 is an apocalyptic number.

It is an amenable number.

722257305 is an abundant number, since it is smaller than the sum of its proper divisors (756167655).

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

722257305 is a wasteful number, since it uses less digits than its factorization.

722257305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759 (or 752 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 33.

The square root of 722257305 is about 26874.8452088566. The cubic root of 722257305 is about 897.2166293218.

The spelling of 722257305 in words is "seven hundred twenty-two million, two hundred fifty-seven thousand, three hundred five".