722978394 has 8 divisors (see below), whose sum is σ = 1445956800. Its totient is φ = 240992796.

The previous prime is 722978383. The next prime is 722978401. The reversal of 722978394 is 493879227.

It is a sphenic number, since it is the product of 3 distinct primes.

722978394 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60248194 + ... + 60248205.

It is an arithmetic number, because the mean of its divisors is an integer number (180744600).

Almost surely, 2^722978394 is an apocalyptic number.

722978394 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

722978394 is a wasteful number, since it uses less digits than its factorization.

722978394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120496404.

The product of its digits is 1524096, while the sum is 51.

The square root of 722978394 is about 26888.2575486029. The cubic root of 722978394 is about 897.5151184466.

The spelling of 722978394 in words is "seven hundred twenty-two million, nine hundred seventy-eight thousand, three hundred ninety-four".