726656770 has 48 divisors (see below), whose sum is σ = 1574027640. Its totient is φ = 240543744.

The previous prime is 726656753. The next prime is 726656849. The reversal of 726656770 is 77656627.

It can be written as a sum of positive squares in 4 ways, for example, as 699020721 + 27636049 = 26439^2 + 5257^2 .

It is a super-2 number, since 2×726656770² = 1056060122773665800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 726656770.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11359 + ... + 39778.

Almost surely, 2^726656770 is an apocalyptic number.

726656770 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

726656770 is an abundant number, since it is smaller than the sum of its proper divisors (847370870).

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

726656770 is a wasteful number, since it uses less digits than its factorization.

726656770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51187 (or 51180 counting only the distinct ones).

The product of its (nonzero) digits is 740880, while the sum is 46.

The square root of 726656770 is about 26956.5719259701. The cubic root of 726656770 is about 899.0346727929.

The spelling of 726656770 in words is "seven hundred twenty-six million, six hundred fifty-six thousand, seven hundred seventy".