726244840 has 24 divisors (see below), whose sum is σ = 1634434470. Its totient is φ = 290429760.

The previous prime is 726244793. The next prime is 726244859. The reversal of 726244840 is 48442627.

It can be written as a sum of positive squares in 3 ways, for example, as 712569636 + 13675204 = 26694^2 + 3698^2 .

It is a super-3 number, since 3×726244840³ (a number of 28 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 726244840.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 168310 + ... + 172570.

Almost surely, 2^726244840 is an apocalyptic number.

It is an amenable number.

726244840 is an abundant number, since it is smaller than the sum of its proper divisors (908189630).

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

726244840 is an frugal number, since it uses more digits than its factorization.

726244840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8533 (or 4268 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 37.

The square root of 726244840 is about 26948.9302199549. The cubic root of 726244840 is about 898.8647579308.

The spelling of 726244840 in words is "seven hundred twenty-six million, two hundred forty-four thousand, eight hundred forty".