722765420 has 96 divisors (see below), whose sum is σ = 1670917248. Its totient is φ = 261015552.

The previous prime is 722765369. The next prime is 722765431. The reversal of 722765420 is 24567227.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 3668762 + ... + 3668958.

It is an arithmetic number, because the mean of its divisors is an integer number (17405388).

Almost surely, 2^722765420 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 722765420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (835458624).

722765420 is an abundant number, since it is smaller than the sum of its proper divisors (948151828).

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

722765420 is a wasteful number, since it uses less digits than its factorization.

722765420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459 (or 457 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 35.

The square root of 722765420 is about 26884.2969035830. The cubic root of 722765420 is about 897.4269801938.

The spelling of 722765420 in words is "seven hundred twenty-two million, seven hundred sixty-five thousand, four hundred twenty".