722896440 has 512 divisors, whose sum is σ = 2866544640. Its totient is φ = 141926400.

The previous prime is 722896429. The next prime is 722896441. The reversal of 722896440 is 44698227.

It is a super-3 number, since 3×722896440³ (a number of 28 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 722896392 and 722896401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722896441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 10181605 + ... + 10181675.

It is an arithmetic number, because the mean of its divisors is an integer number (5598720).

Almost surely, 2^722896440 is an apocalyptic number.

722896440 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722896440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1433272320).

722896440 is an abundant number, since it is smaller than the sum of its proper divisors (2143648200).

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

722896440 is a wasteful number, since it uses less digits than its factorization.

722896440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163 (or 159 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 722896440 is about 26886.7335316137. The cubic root of 722896440 is about 897.4812042318.

The spelling of 722896440 in words is "seven hundred twenty-two million, eight hundred ninety-six thousand, four hundred forty".