722951820 has 72 divisors (see below), whose sum is σ = 2223879840. Its totient is φ = 190068480.

The previous prime is 722951807. The next prime is 722951821. The reversal of 722951820 is 28159227.

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

It is not an unprimeable number, because it can be changed into a prime (722951821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15505 + ... + 41064.

It is an arithmetic number, because the mean of its divisors is an integer number (30887220).

Almost surely, 2^722951820 is an apocalyptic number.

It is an amenable number.

722951820 is an abundant number, since it is smaller than the sum of its proper divisors (1500928020).

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

722951820 is a wasteful number, since it uses less digits than its factorization.

722951820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56655 (or 56650 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 722951820 is about 26887.7633878313. The cubic root of 722951820 is about 897.5041218713.

It can be divided in two parts, 7229 and 51820, that added together give a 10-th power (59049 = 3¹⁰).

The spelling of 722951820 in words is "seven hundred twenty-two million, nine hundred fifty-one thousand, eight hundred twenty".