726342388 has 12 divisors (see below), whose sum is σ = 1302101892. Its totient is φ = 354313280.

The previous prime is 726342367. The next prime is 726342389. The reversal of 726342388 is 883243627.

It can be written as a sum of positive squares in 2 ways, for example, as 313927524 + 412414864 = 17718^2 + 20308^2 .

It is a super-3 number, since 3×726342388³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726342389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2214295 + ... + 2214622.

It is an arithmetic number, because the mean of its divisors is an integer number (108508491).

Almost surely, 2^726342388 is an apocalyptic number.

It is an amenable number.

726342388 is a deficient number, since it is larger than the sum of its proper divisors (575759504).

726342388 is a wasteful number, since it uses less digits than its factorization.

726342388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4428962 (or 4428960 counting only the distinct ones).

The product of its digits is 387072, while the sum is 43.

The square root of 726342388 is about 26950.7400269455. The cubic root of 726342388 is about 898.9050008025.

The spelling of 726342388 in words is "seven hundred twenty-six million, three hundred forty-two thousand, three hundred eighty-eight".