721402260 has 96 divisors (see below), whose sum is σ = 2199657600. Its totient is φ = 175956480.

The previous prime is 721402229. The next prime is 721402267. The reversal of 721402260 is 62204127.

It is a self number, because there is not a number n which added to its sum of digits gives 721402260.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721402267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22150 + ... + 43970.

It is an arithmetic number, because the mean of its divisors is an integer number (22913100).

Almost surely, 2^721402260 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 721402260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1099828800).

721402260 is an abundant number, since it is smaller than the sum of its proper divisors (1478255340).

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

721402260 is a wasteful number, since it uses less digits than its factorization.

721402260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21881 (or 21879 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 721402260 is about 26858.9325923425. The cubic root of 721402260 is about 896.8624325919.

Adding to 721402260 its reverse (62204127), we get a palindrome (783606387).

The spelling of 721402260 in words is "seven hundred twenty-one million, four hundred two thousand, two hundred sixty".