722278 has 8 divisors (see below), whose sum is σ = 1101960. Its totient is φ = 354960.

The previous prime is 722273. The next prime is 722287. The reversal of 722278 is 872227.

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2943 + ... + 3178.

It is an arithmetic number, because the mean of its divisors is an integer number (137745).

2⁷²²²⁷⁸ is an apocalyptic number.

722278 is a deficient number, since it is larger than the sum of its proper divisors (379682).

722278 is a wasteful number, since it uses less digits than its factorization.

722278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6182.

The product of its digits is 3136, while the sum is 28.

The square root of 722278 is about 849.8694017318. The cubic root of 722278 is about 89.7225198623.

It can be divided in two parts, 722 and 278, that added together give a cube (1000 = 10³).

The spelling of 722278 in words is "seven hundred twenty-two thousand, two hundred seventy-eight".