260557940 has 12 divisors (see below), whose sum is σ = 547171716. Its totient is φ = 104223168.

The previous prime is 260557937. The next prime is 260557943. The reversal of 260557940 is 49755062.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (260557937) and next prime (260557943).

It can be written as a sum of positive squares in 2 ways, for example, as 82228624 + 178329316 = 9068^2 + 13354^2 .

It is a junction number, because it is equal to n+sod(n) for n = 260557894 and 260557903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260557943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6513929 + ... + 6513968.

It is an arithmetic number, because the mean of its divisors is an integer number (45597643).

Almost surely, 2^260557940 is an apocalyptic number.

260557940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

260557940 is an abundant number, since it is smaller than the sum of its proper divisors (286613776).

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

260557940 is a wasteful number, since it uses less digits than its factorization.

260557940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13027906 (or 13027904 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 260557940 is about 16141.8072098511. The cubic root of 260557940 is about 638.7066491464.

The spelling of 260557940 in words is "two hundred sixty million, five hundred fifty-seven thousand, nine hundred forty".