726873220 has 12 divisors (see below), whose sum is σ = 1526433804. Its totient is φ = 290749280.

The previous prime is 726873211. The next prime is 726873223. The reversal of 726873220 is 22378627.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 124367104 + 602506116 = 11152^2 + 24546^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 726873220.

It is not an unprimeable number, because it can be changed into a prime (726873223) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 18171811 + ... + 18171850.

It is an arithmetic number, because the mean of its divisors is an integer number (127202817).

Almost surely, 2^726873220 is an apocalyptic number.

It is an amenable number.

726873220 is an abundant number, since it is smaller than the sum of its proper divisors (799560584).

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

726873220 is a wasteful number, since it uses less digits than its factorization.

726873220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36343670 (or 36343668 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 726873220 is about 26960.5864179546. The cubic root of 726873220 is about 899.1239293923.

The spelling of 726873220 in words is "seven hundred twenty-six million, eight hundred seventy-three thousand, two hundred twenty".