722398408 has 32 divisors (see below), whose sum is σ = 1436664600. Its totient is φ = 339361792.

The previous prime is 722398367. The next prime is 722398447. The reversal of 722398408 is 804893227.

It is a happy number.

722398408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 429235524 + 293162884 = 20718^2 + 17122^2 .

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, 79608 + ... + 88216.

Almost surely, 2^722398408 is an apocalyptic number.

It is an amenable number.

722398408 is a deficient number, since it is larger than the sum of its proper divisors (714266192).

722398408 is a wasteful number, since it uses less digits than its factorization.

722398408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9249 (or 9245 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 722398408 is about 26877.4702678656. The cubic root of 722398408 is about 897.2750534289.

The spelling of 722398408 in words is "seven hundred twenty-two million, three hundred ninety-eight thousand, four hundred eight".