2261878 has 4 divisors (see below), whose sum is σ = 3392820. Its totient is φ = 1130938.

The previous prime is 2261863. The next prime is 2261887. The reversal of 2261878 is 8781622.

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

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, 565468 + ... + 565471.

It is an arithmetic number, because the mean of its divisors is an integer number (848205).

2^2261878 is an apocalyptic number.

2261878 is a deficient number, since it is larger than the sum of its proper divisors (1130942).

2261878 is a wasteful number, since it uses less digits than its factorization.

2261878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130941.

The product of its digits is 10752, while the sum is 34.

The square root of 2261878 is about 1503.9541216407. The cubic root of 2261878 is about 131.2672515494.

The spelling of 2261878 in words is "two million, two hundred sixty-one thousand, eight hundred seventy-eight".