721134360 has 256 divisors, whose sum is σ = 2560896000. Its totient is φ = 179988480.

The previous prime is 721134353. The next prime is 721134361. The reversal of 721134360 is 63431127.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721134361) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2318605 + ... + 2318915.

It is an arithmetic number, because the mean of its divisors is an integer number (10003500).

Almost surely, 2^721134360 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 721134360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1280448000).

721134360 is an abundant number, since it is smaller than the sum of its proper divisors (1839761640).

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

721134360 is a wasteful number, since it uses less digits than its factorization.

721134360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463 (or 453 counting only the distinct ones).

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

The square root of 721134360 is about 26853.9449615880. The cubic root of 721134360 is about 896.7513992118.

Adding to 721134360 its reverse (63431127), we get a palindrome (784565487).

The spelling of 721134360 in words is "seven hundred twenty-one million, one hundred thirty-four thousand, three hundred sixty".