722686338 has 24 divisors (see below), whose sum is σ = 1708168176. Its totient is φ = 218995800.

The previous prime is 722686301. The next prime is 722686343. The reversal of 722686338 is 833686227.

722686338 is a `hidden beast` number, since 7 + 2 + 2 + 6 + 8 + 633 + 8 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 722686293 and 722686302.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1824768 + ... + 1825163.

It is an arithmetic number, because the mean of its divisors is an integer number (71173674).

Almost surely, 2^722686338 is an apocalyptic number.

722686338 is an abundant number, since it is smaller than the sum of its proper divisors (985481838).

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

722686338 is a wasteful number, since it uses less digits than its factorization.

722686338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3649950 (or 3649947 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 722686338 is about 26882.8260791160. The cubic root of 722686338 is about 897.3942480851.

It can be divided in two parts, 72268 and 6338, that added together give a triangular number (78606 = T₃₉₆).

The spelling of 722686338 in words is "seven hundred twenty-two million, six hundred eighty-six thousand, three hundred thirty-eight".