260994638 has 4 divisors (see below), whose sum is σ = 391491960. Its totient is φ = 130497318.

The previous prime is 260994623. The next prime is 260994667. The reversal of 260994638 is 836499062.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×260994638³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 260994592 and 260994601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65248658 + ... + 65248661.

It is an arithmetic number, because the mean of its divisors is an integer number (97872990).

Almost surely, 2^260994638 is an apocalyptic number.

260994638 is a deficient number, since it is larger than the sum of its proper divisors (130497322).

260994638 is a wasteful number, since it uses less digits than its factorization.

260994638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130497321.

The product of its (nonzero) digits is 559872, while the sum is 47.

The square root of 260994638 is about 16155.3284708173. The cubic root of 260994638 is about 639.0632764616.

The spelling of 260994638 in words is "two hundred sixty million, nine hundred ninety-four thousand, six hundred thirty-eight".