260891772 has 48 divisors (see below), whose sum is σ = 638668800. Its totient is φ = 82774720.

The previous prime is 260891759. The next prime is 260891777. The reversal of 260891772 is 277198062.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260891777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19429 + ... + 29987.

It is an arithmetic number, because the mean of its divisors is an integer number (13305600).

Almost surely, 2^260891772 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 260891772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319334400).

260891772 is an abundant number, since it is smaller than the sum of its proper divisors (377777028).

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

260891772 is a wasteful number, since it uses less digits than its factorization.

260891772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10666 (or 10664 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 260891772 is about 16152.1445015824. The cubic root of 260891772 is about 638.9793072764.

The spelling of 260891772 in words is "two hundred sixty million, eight hundred ninety-one thousand, seven hundred seventy-two".