2138377340 has 36 divisors (see below), whose sum is σ = 4935946008. Its totient is φ = 777590880.

The previous prime is 2138377333. The next prime is 2138377403. The reversal of 2138377340 is 437738312.

It is a junction number, because it is equal to n+sod(n) for n = 2138377294 and 2138377303.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 439394 + ... + 444233.

Almost surely, 2^2138377340 is an apocalyptic number.

2138377340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2138377340 is an abundant number, since it is smaller than the sum of its proper divisors (2797568668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2138377340 is a wasteful number, since it uses less digits than its factorization.

2138377340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883658 (or 883645 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 2138377340 is about 46242.5922716277. The cubic root of 2138377340 is about 1288.3329506833.

The spelling of 2138377340 in words is "two billion, one hundred thirty-eight million, three hundred seventy-seven thousand, three hundred forty".