2403878 has 4 divisors (see below), whose sum is σ = 3605820. Its totient is φ = 1201938.

The previous prime is 2403859. The next prime is 2403881. The reversal of 2403878 is 8783042.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8783042 = 2 ⋅4391521.

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, 600968 + ... + 600971.

It is an arithmetic number, because the mean of its divisors is an integer number (901455).

2^2403878 is an apocalyptic number.

2403878 is a deficient number, since it is larger than the sum of its proper divisors (1201942).

2403878 is a wasteful number, since it uses less digits than its factorization.

2403878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201941.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 2403878 is about 1550.4444524071. Note that the first 4 decimals coincide. The cubic root of 2403878 is about 133.9586640155.

The spelling of 2403878 in words is "two million, four hundred three thousand, eight hundred seventy-eight".