726321512 has 96 divisors (see below), whose sum is σ = 1684281600. Its totient is φ = 291949056.

The previous prime is 726321511. The next prime is 726321517. The reversal of 726321512 is 215123627.

It is a happy number.

It is a super-2 number, since 2×726321512² = 1055085877587932288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (726321511) 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, 841193 + ... + 842055.

It is an arithmetic number, because the mean of its divisors is an integer number (17544600).

Almost surely, 2^726321512 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 726321512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (842140800).

726321512 is an abundant number, since it is smaller than the sum of its proper divisors (957960088).

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

726321512 is a wasteful number, since it uses less digits than its factorization.

726321512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015 (or 1004 counting only the distinct ones).

The product of its digits is 5040, while the sum is 29.

The square root of 726321512 is about 26950.3527249645. The cubic root of 726321512 is about 898.8963888307.

The spelling of 726321512 in words is "seven hundred twenty-six million, three hundred twenty-one thousand, five hundred twelve".