722903220 has 72 divisors (see below), whose sum is σ = 2361491496. Its totient is φ = 177944832.

The previous prime is 722903219. The next prime is 722903231. The reversal of 722903220 is 22309227.

It can be written as a sum of positive squares in 4 ways, for example, as 12574116 + 710329104 = 3546^2 + 26652^2 .

It is a super-3 number, since 3×722903220³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 152127 + ... + 156806.

It is an arithmetic number, because the mean of its divisors is an integer number (32798493).

Almost surely, 2^722903220 is an apocalyptic number.

It is an amenable number.

722903220 is an abundant number, since it is smaller than the sum of its proper divisors (1638588276).

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

722903220 is a wasteful number, since it uses less digits than its factorization.

722903220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308961 (or 308956 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 722903220 is about 26886.8596158049. The cubic root of 722903220 is about 897.4840100295.

The spelling of 722903220 in words is "seven hundred twenty-two million, nine hundred three thousand, two hundred twenty".