4005878 has 4 divisors (see below), whose sum is σ = 6008820. Its totient is φ = 2002938.

The previous prime is 4005847. The next prime is 4005889. The reversal of 4005878 is 8785004.

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, 1001468 + ... + 1001471.

It is an arithmetic number, because the mean of its divisors is an integer number (1502205).

Almost surely, 2^4005878 is an apocalyptic number.

4005878 is a deficient number, since it is larger than the sum of its proper divisors (2002942).

4005878 is a wasteful number, since it uses less digits than its factorization.

4005878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2002941.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 4005878 is about 2001.4689605387. The cubic root of 4005878 is about 158.8178233352.

The spelling of 4005878 in words is "four million, five thousand, eight hundred seventy-eight".