260889778 has 8 divisors (see below), whose sum is σ = 391466880. Its totient is φ = 130400820.

The previous prime is 260889773. The next prime is 260889781. The reversal of 260889778 is 877988062.

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

It is not an unprimeable number, because it can be changed into a prime (260889773) 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, 14058 + ... + 26821.

It is an arithmetic number, because the mean of its divisors is an integer number (48933360).

Almost surely, 2^260889778 is an apocalyptic number.

260889778 is a deficient number, since it is larger than the sum of its proper divisors (130577102).

260889778 is a wasteful number, since it uses less digits than its factorization.

260889778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44072.

The product of its (nonzero) digits is 2709504, while the sum is 55.

The square root of 260889778 is about 16152.0827759147. The cubic root of 260889778 is about 638.9776793625.

The spelling of 260889778 in words is "two hundred sixty million, eight hundred eighty-nine thousand, seven hundred seventy-eight".