2138449406 has 8 divisors (see below), whose sum is σ = 3268196424. Its totient is φ = 1049050600.

The previous prime is 2138449387. The next prime is 2138449421. The reversal of 2138449406 is 6049448312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10086920 + ... + 10087131.

It is an arithmetic number, because the mean of its divisors is an integer number (408524553).

Almost surely, 2^2138449406 is an apocalyptic number.

2138449406 is a deficient number, since it is larger than the sum of its proper divisors (1129747018).

2138449406 is a wasteful number, since it uses less digits than its factorization.

2138449406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20174106.

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 2138449406 is about 46243.3714817594. The cubic root of 2138449406 is about 1288.3474233331.

The spelling of 2138449406 in words is "two billion, one hundred thirty-eight million, four hundred forty-nine thousand, four hundred six".