213878830 has 16 divisors (see below), whose sum is σ = 419980464. Its totient is φ = 77774080.

The previous prime is 213878809. The next prime is 213878849. The reversal of 213878830 is 38878312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 972067 + ... + 972286.

It is an arithmetic number, because the mean of its divisors is an integer number (26248779).

Almost surely, 2^213878830 is an apocalyptic number.

213878830 is a deficient number, since it is larger than the sum of its proper divisors (206101634).

213878830 is a wasteful number, since it uses less digits than its factorization.

213878830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944371.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 213878830 is about 14624.5967465773. The cubic root of 213878830 is about 598.0294892673.

The spelling of 213878830 in words is "two hundred thirteen million, eight hundred seventy-eight thousand, eight hundred thirty".