722228730 has 32 divisors (see below), whose sum is σ = 1734248448. Its totient is φ = 192494400.

The previous prime is 722228701. The next prime is 722228747. The reversal of 722228730 is 37822227.

It is a super-2 number, since 2×722228730² = 1043228676874825800, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 722228691 and 722228700.

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, 66375 + ... + 76485.

It is an arithmetic number, because the mean of its divisors is an integer number (54195264).

Almost surely, 2^722228730 is an apocalyptic number.

722228730 is an abundant number, since it is smaller than the sum of its proper divisors (1012019718).

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

722228730 is a wasteful number, since it uses less digits than its factorization.

722228730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12502.

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 722228730 is about 26874.3135726292. The cubic root of 722228730 is about 897.2047968335.

The spelling of 722228730 in words is "seven hundred twenty-two million, two hundred twenty-eight thousand, seven hundred thirty".