723998778 has 16 divisors (see below), whose sum is σ = 1453228320. Its totient is φ = 240461136.

The previous prime is 723998767. The next prime is 723998809. The reversal of 723998778 is 877899327.

723998778 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, 216148 + ... + 219471.

It is an arithmetic number, because the mean of its divisors is an integer number (90826770).

Almost surely, 2^723998778 is an apocalyptic number.

723998778 is an abundant number, since it is smaller than the sum of its proper divisors (729229542).

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

723998778 is a wasteful number, since it uses less digits than its factorization.

723998778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435901.

The product of its digits is 10668672, while the sum is 60.

The square root of 723998778 is about 26907.2253865017. The cubic root of 723998778 is about 897.9371594394.

The spelling of 723998778 in words is "seven hundred twenty-three million, nine hundred ninety-eight thousand, seven hundred seventy-eight".