722406740 has 48 divisors (see below), whose sum is σ = 1669671360. Its totient is φ = 260359680.

The previous prime is 722406739. The next prime is 722406743. The reversal of 722406740 is 47604227.

It is a junction number, because it is equal to n+sod(n) for n = 722406697 and 722406706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722406743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10331 + ... + 39389.

It is an arithmetic number, because the mean of its divisors is an integer number (34784820).

Almost surely, 2^722406740 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 722406740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (834835680).

722406740 is an abundant number, since it is smaller than the sum of its proper divisors (947264620).

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

722406740 is a wasteful number, since it uses less digits than its factorization.

722406740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29192 (or 29190 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 722406740 is about 26877.6252671251. The cubic root of 722406740 is about 897.2785030799.

The spelling of 722406740 in words is "seven hundred twenty-two million, four hundred six thousand, seven hundred forty".