2812127138 has 4 divisors (see below), whose sum is σ = 4218190710. Its totient is φ = 1406063568.

The previous prime is 2812127137. The next prime is 2812127141. The reversal of 2812127138 is 8317212182.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2808258049 + 3869089 = 52993^2 + 1967^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2812127098 and 2812127107.

It is not an unprimeable number, because it can be changed into a prime (2812127137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703031783 + ... + 703031786.

Almost surely, 2^2812127138 is an apocalyptic number.

2812127138 is a deficient number, since it is larger than the sum of its proper divisors (1406063572).

2812127138 is a wasteful number, since it uses less digits than its factorization.

2812127138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406063571.

The product of its digits is 10752, while the sum is 35.

The square root of 2812127138 is about 53029.4930958236. The cubic root of 2812127138 is about 1411.4916625069.

The spelling of 2812127138 in words is "two billion, eight hundred twelve million, one hundred twenty-seven thousand, one hundred thirty-eight".