722309978 has 16 divisors (see below), whose sum is σ = 1186587360. Its totient is φ = 327722736.

The previous prime is 722309953. The next prime is 722309981. The reversal of 722309978 is 879903227.

722309978 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 7 ways as a sum of consecutive naturals, for example, 233900 + ... + 236967.

It is an arithmetic number, because the mean of its divisors is an integer number (74161710).

Almost surely, 2^722309978 is an apocalyptic number.

722309978 is a deficient number, since it is larger than the sum of its proper divisors (464277382).

722309978 is a wasteful number, since it uses less digits than its factorization.

722309978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470941.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 722309978 is about 26875.8251594253. The cubic root of 722309978 is about 897.2384396205.

The spelling of 722309978 in words is "seven hundred twenty-two million, three hundred nine thousand, nine hundred seventy-eight".