2138648890 has 32 divisors (see below), whose sum is σ = 4405209984. Its totient is φ = 732300480.

The previous prime is 2138648833. The next prime is 2138648917. The reversal of 2138648890 is 988468312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35680 + ... + 74500.

It is an arithmetic number, because the mean of its divisors is an integer number (137662812).

Almost surely, 2^2138648890 is an apocalyptic number.

2138648890 is an abundant number, since it is smaller than the sum of its proper divisors (2266561094).

2138648890 is a wasteful number, since it uses less digits than its factorization.

2138648890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39622.

The product of its (nonzero) digits is 663552, while the sum is 49.

The square root of 2138648890 is about 46245.5283243688. The cubic root of 2138648890 is about 1288.3874829990.

The spelling of 2138648890 in words is "two billion, one hundred thirty-eight million, six hundred forty-eight thousand, eight hundred ninety".