722316 has 24 divisors (see below), whose sum is σ = 1926400. Its totient is φ = 206352.

The previous prime is 722311. The next prime is 722317. The reversal of 722316 is 613227.

722316 = T₂₁₃ + T₂₁₄ + ... + T₂₄₀.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 722292 and 722301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722311) by changing a digit.

722316 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4216 + ... + 4383.

2⁷²²³¹⁶ is an apocalyptic number.

It is an amenable number.

722316 is an abundant number, since it is smaller than the sum of its proper divisors (1204084).

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

722316 is a wasteful number, since it uses less digits than its factorization.

722316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8613 (or 8611 counting only the distinct ones).

The product of its digits is 504, while the sum is 21.

The square root of 722316 is about 849.8917578139. The cubic root of 722316 is about 89.7240933081.

The spelling of 722316 in words is "seven hundred twenty-two thousand, three hundred sixteen".