722393990 has 16 divisors (see below), whose sum is σ = 1301196960. Its totient is φ = 288760320.

The previous prime is 722393989. The next prime is 722394133. The reversal of 722393990 is 99393227.

It is a congruent number.

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, 8795 + ... + 39014.

It is an arithmetic number, because the mean of its divisors is an integer number (81324810).

Almost surely, 2^722393990 is an apocalyptic number.

722393990 is a deficient number, since it is larger than the sum of its proper divisors (578802970).

722393990 is a wasteful number, since it uses less digits than its factorization.

722393990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49327.

The product of its (nonzero) digits is 183708, while the sum is 44.

The square root of 722393990 is about 26877.3880799456. The cubic root of 722393990 is about 897.2732242586.

The spelling of 722393990 in words is "seven hundred twenty-two million, three hundred ninety-three thousand, nine hundred ninety".