260887644 has 36 divisors (see below), whose sum is σ = 698259744. Its totient is φ = 81846912.

The previous prime is 260887577. The next prime is 260887657. The reversal of 260887644 is 446788062.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 260887644.

It is a congruent number.

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, 212532 + ... + 213755.

It is an arithmetic number, because the mean of its divisors is an integer number (19396104).

Almost surely, 2^260887644 is an apocalyptic number.

It is an amenable number.

260887644 is an abundant number, since it is smaller than the sum of its proper divisors (437372100).

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

260887644 is a wasteful number, since it uses less digits than its factorization.

260887644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426314 (or 426309 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The square root of 260887644 is about 16152.0167161875. The cubic root of 260887644 is about 638.9759371426.

The spelling of 260887644 in words is "two hundred sixty million, eight hundred eighty-seven thousand, six hundred forty-four".