264630878 has 4 divisors (see below), whose sum is σ = 396946320. Its totient is φ = 132315438.

The previous prime is 264630791. The next prime is 264630881. The reversal of 264630878 is 878036462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 878036462 = 2 ⋅439018231.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66157718 + ... + 66157721.

It is an arithmetic number, because the mean of its divisors is an integer number (99236580).

Almost surely, 2^264630878 is an apocalyptic number.

264630878 is a deficient number, since it is larger than the sum of its proper divisors (132315442).

264630878 is a wasteful number, since it uses less digits than its factorization.

264630878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132315441.

The product of its (nonzero) digits is 387072, while the sum is 44.

The square root of 264630878 is about 16267.4791532063. The cubic root of 264630878 is about 642.0174602123.

The spelling of 264630878 in words is "two hundred sixty-four million, six hundred thirty thousand, eight hundred seventy-eight".