722734778 has 32 divisors (see below), whose sum is σ = 1122750720. Its totient is φ = 348779520.

The previous prime is 722734777. The next prime is 722734799. The reversal of 722734778 is 877437227.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (722734777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2666783 + ... + 2667053.

It is an arithmetic number, because the mean of its divisors is an integer number (35085960).

Almost surely, 2^722734778 is an apocalyptic number.

722734778 is a deficient number, since it is larger than the sum of its proper divisors (400015942).

722734778 is a wasteful number, since it uses less digits than its factorization.

722734778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662.

The product of its digits is 921984, while the sum is 47.

The square root of 722734778 is about 26883.7270109633. The cubic root of 722734778 is about 897.4142977267.

The spelling of 722734778 in words is "seven hundred twenty-two million, seven hundred thirty-four thousand, seven hundred seventy-eight".