2807138 has 4 divisors (see below), whose sum is σ = 4210710. Its totient is φ = 1403568.

The previous prime is 2807131. The next prime is 2807141. The reversal of 2807138 is 8317082.

2807138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 2455489 + 351649 = 1567^2 + 593^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2807138.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2807131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 701783 + ... + 701786.

2^2807138 is an apocalyptic number.

2807138 is a deficient number, since it is larger than the sum of its proper divisors (1403572).

2807138 is a wasteful number, since it uses less digits than its factorization.

2807138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1403571.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 2807138 is about 1675.4515809178. The cubic root of 2807138 is about 141.0656435287.

The spelling of 2807138 in words is "two million, eight hundred seven thousand, one hundred thirty-eight".