722064420 has 288 divisors, whose sum is σ = 2780144640. Its totient is φ = 147329280.

The previous prime is 722064383. The next prime is 722064439. The reversal of 722064420 is 24460227.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 817299 + ... + 818181.

It is an arithmetic number, because the mean of its divisors is an integer number (9653280).

Almost surely, 2^722064420 is an apocalyptic number.

722064420 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 722064420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1390072320).

722064420 is an abundant number, since it is smaller than the sum of its proper divisors (2058080220).

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

722064420 is a wasteful number, since it uses less digits than its factorization.

722064420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975 (or 970 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 722064420 is about 26871.2563904258. The cubic root of 722064420 is about 897.1367524153.

The spelling of 722064420 in words is "seven hundred twenty-two million, sixty-four thousand, four hundred twenty".