2138903866 has 16 divisors (see below), whose sum is σ = 3534681888. Its totient is φ = 962602000.

The previous prime is 2138903861. The next prime is 2138903873. The reversal of 2138903866 is 6683098312.

It is not an unprimeable number, because it can be changed into a prime (2138903861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479080 + ... + 483523.

It is an arithmetic number, because the mean of its divisors is an integer number (220917618).

Almost surely, 2^2138903866 is an apocalyptic number.

2138903866 is a deficient number, since it is larger than the sum of its proper divisors (1395778022).

2138903866 is a wasteful number, since it uses less digits than its factorization.

2138903866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962717.

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 2138903866 is about 46248.2850060410. The cubic root of 2138903866 is about 1288.4386827439.

The spelling of 2138903866 in words is "two billion, one hundred thirty-eight million, nine hundred three thousand, eight hundred sixty-six".