260631720 has 48 divisors (see below), whose sum is σ = 847054260. Its totient is φ = 69501696.

The previous prime is 260631713. The next prime is 260631739. The reversal of 260631720 is 27136062.

It is a happy number.

260631720 is a `hidden beast` number, since 2 + 6 + 0 + 631 + 7 + 20 = 666.

260631720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 257987844 + 2643876 = 16062^2 + 1626^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 361629 + ... + 362348.

Almost surely, 2^260631720 is an apocalyptic number.

260631720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

260631720 is an abundant number, since it is smaller than the sum of its proper divisors (586422540).

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

260631720 is a wasteful number, since it uses less digits than its factorization.

260631720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723994 (or 723987 counting only the distinct ones).

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

The square root of 260631720 is about 16144.0924179713. The cubic root of 260631720 is about 638.7669291867.

Adding to 260631720 its reverse (27136062), we get a palindrome (287767782).

The spelling of 260631720 in words is "two hundred sixty million, six hundred thirty-one thousand, seven hundred twenty".