260447781 has 24 divisors (see below), whose sum is σ = 384687072. Its totient is φ = 156613600.

The previous prime is 260447779. The next prime is 260447783. The reversal of 260447781 is 187744062.

260447781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (260447779) and next prime (260447783).

It is not a de Polignac number, because 260447781 - 2¹ = 260447779 is a prime.

It is a super-2 number, since 2×260447781² = 135666093255647922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260447783) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44815 + ... + 50291.

It is an arithmetic number, because the mean of its divisors is an integer number (16028628).

Almost surely, 2^260447781 is an apocalyptic number.

It is an amenable number.

260447781 is a deficient number, since it is larger than the sum of its proper divisors (124239291).

260447781 is a wasteful number, since it uses less digits than its factorization.

260447781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5633 (or 5622 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 260447781 is about 16138.3946227622. The cubic root of 260447781 is about 638.6166254027.

The spelling of 260447781 in words is "two hundred sixty million, four hundred forty-seven thousand, seven hundred eighty-one".