260904985 has 16 divisors (see below), whose sum is σ = 356400000. Its totient is φ = 181498240.

The previous prime is 260904977. The next prime is 260904997. The reversal of 260904985 is 589409062.

It is not a de Polignac number, because 260904985 - 2³ = 260904977 is a prime.

It is a super-2 number, since 2×260904985² = 136142822395700450, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101860 + ... + 104389.

It is an arithmetic number, because the mean of its divisors is an integer number (22275000).

Almost surely, 2^260904985 is an apocalyptic number.

It is an amenable number.

260904985 is a deficient number, since it is larger than the sum of its proper divisors (95495015).

260904985 is a wasteful number, since it uses less digits than its factorization.

260904985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206288.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 260904985 is about 16152.5535132994. The cubic root of 260904985 is about 638.9900942411.

The spelling of 260904985 in words is "two hundred sixty million, nine hundred four thousand, nine hundred eighty-five".