2788138 has 8 divisors (see below), whose sum is σ = 4244832. Its totient is φ = 1373196.

The previous prime is 2788133. The next prime is 2788199. The reversal of 2788138 is 8318872.

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

It is a junction number, because it is equal to n+sod(n) for n = 2788097 and 2788106.

It is not an unprimeable number, because it can be changed into a prime (2788133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10270 + ... + 10537.

It is an arithmetic number, because the mean of its divisors is an integer number (530604).

2^2788138 is an apocalyptic number.

2788138 is a deficient number, since it is larger than the sum of its proper divisors (1456694).

2788138 is a wasteful number, since it uses less digits than its factorization.

2788138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20876.

The product of its digits is 21504, while the sum is 37.

The square root of 2788138 is about 1669.7718407016. The cubic root of 2788138 is about 140.7466570595.

It can be divided in two parts, 2788 and 138, that added together give a triangular number (2926 = T₇₆).

The spelling of 2788138 in words is "two million, seven hundred eighty-eight thousand, one hundred thirty-eight".