260642890 has 8 divisors (see below), whose sum is σ = 469157220. Its totient is φ = 104257152.

The previous prime is 260642867. The next prime is 260642891. The reversal of 260642890 is 98246062.

It can be written as a sum of positive squares in 2 ways, for example, as 241274089 + 19368801 = 15533^2 + 4401^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×260642890² = 135869432215104200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (260642891) 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, 13032135 + ... + 13032154.

Almost surely, 2^260642890 is an apocalyptic number.

260642890 is a deficient number, since it is larger than the sum of its proper divisors (208514330).

260642890 is a wasteful number, since it uses less digits than its factorization.

260642890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26064296.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 260642890 is about 16144.4383612438. The cubic root of 260642890 is about 638.7760543547.

The spelling of 260642890 in words is "two hundred sixty million, six hundred forty-two thousand, eight hundred ninety".