264878 has 4 divisors (see below), whose sum is σ = 397320. Its totient is φ = 132438.

The previous prime is 264871. The next prime is 264881. The reversal of 264878 is 878462.

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264871) by changing a digit.

264878 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66218 + ... + 66221.

It is an arithmetic number, because the mean of its divisors is an integer number (99330).

2²⁶⁴⁸⁷⁸ is an apocalyptic number.

264878 is a deficient number, since it is larger than the sum of its proper divisors (132442).

264878 is a wasteful number, since it uses less digits than its factorization.

264878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132441.

The product of its digits is 21504, while the sum is 35.

The square root of 264878 is about 514.6629965327. The cubic root of 264878 is about 64.2217244504.

The spelling of 264878 in words is "two hundred sixty-four thousand, eight hundred seventy-eight".