260231640 has 64 divisors (see below), whose sum is σ = 783272160. Its totient is φ = 69166080.

The previous prime is 260231627. The next prime is 260231659. The reversal of 260231640 is 46132062.

260231640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 260231640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34620 + ... + 41460.

Almost surely, 2^260231640 is an apocalyptic number.

260231640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 260231640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (391636080).

260231640 is an abundant number, since it is smaller than the sum of its proper divisors (523040520).

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

260231640 is a wasteful number, since it uses less digits than its factorization.

260231640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7172 (or 7168 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 260231640 is about 16131.6967489474. The cubic root of 260231640 is about 638.4399176364.

The spelling of 260231640 in words is "two hundred sixty million, two hundred thirty-one thousand, six hundred forty".