260378819 has 4 divisors (see below), whose sum is σ = 261347040. Its totient is φ = 259410600.

The previous prime is 260378777. The next prime is 260378821. The reversal of 260378819 is 918873062.

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

It is a cyclic number.

It is not a de Polignac number, because 260378819 - 2⁸ = 260378563 is a prime.

It is a super-2 number, since 2×260378819² = 135594258767669522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 260378819.

It is not an unprimeable number, because it can be changed into a prime (260378119) 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, 483707 + ... + 484244.

It is an arithmetic number, because the mean of its divisors is an integer number (65336760).

Almost surely, 2^260378819 is an apocalyptic number.

260378819 is a deficient number, since it is larger than the sum of its proper divisors (968221).

260378819 is an equidigital number, since it uses as much as digits as its factorization.

260378819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968220.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 260378819 is about 16136.2578995255. The cubic root of 260378819 is about 638.5602556036.

The spelling of 260378819 in words is "two hundred sixty million, three hundred seventy-eight thousand, eight hundred nineteen".