260978538 has 16 divisors (see below), whose sum is σ = 536064480. Its totient is φ = 84641616.

The previous prime is 260978513. The next prime is 260978579. The reversal of 260978538 is 835879062.

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 in 7 ways as a sum of consecutive naturals, for example, 587568 + ... + 588011.

It is an arithmetic number, because the mean of its divisors is an integer number (33504030).

Almost surely, 2^260978538 is an apocalyptic number.

260978538 is an abundant number, since it is smaller than the sum of its proper divisors (275085942).

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

260978538 is a wasteful number, since it uses less digits than its factorization.

260978538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175621.

The product of its (nonzero) digits is 725760, while the sum is 48.

The square root of 260978538 is about 16154.8301755234. The cubic root of 260978538 is about 639.0501355399.

The spelling of 260978538 in words is "two hundred sixty million, nine hundred seventy-eight thousand, five hundred thirty-eight".