260109978 has 16 divisors (see below), whose sum is σ = 528748896. Its totient is φ = 85281840.

The previous prime is 260109977. The next prime is 260109989. The reversal of 260109978 is 879901062.

It is not an unprimeable number, because it can be changed into a prime (260109977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354976 + ... + 355707.

It is an arithmetic number, because the mean of its divisors is an integer number (33046806).

Almost surely, 2^260109978 is an apocalyptic number.

260109978 is an abundant number, since it is smaller than the sum of its proper divisors (268638918).

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

260109978 is a wasteful number, since it uses less digits than its factorization.

260109978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710749.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 260109978 is about 16127.9254090537. The cubic root of 260109978 is about 638.3404088745.

The spelling of 260109978 in words is "two hundred sixty million, one hundred nine thousand, nine hundred seventy-eight".