722814840 has 320 divisors, whose sum is σ = 2808574560. Its totient is φ = 164782080.

The previous prime is 722814839. The next prime is 722814847. The reversal of 722814840 is 48418227.

722814840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×722814840² = 1044922585848451200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 722814795 and 722814804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722814847) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 605284 + ... + 606476.

Almost surely, 2^722814840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722814840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1404287280).

722814840 is an abundant number, since it is smaller than the sum of its proper divisors (2085759720).

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

722814840 is a wasteful number, since it uses less digits than its factorization.

722814840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244 (or 1231 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 722814840 is about 26885.2160117787. The cubic root of 722814840 is about 897.4474339627.

The spelling of 722814840 in words is "seven hundred twenty-two million, eight hundred fourteen thousand, eight hundred forty".