2788538 has 4 divisors (see below), whose sum is σ = 4182810. Its totient is φ = 1394268.

The previous prime is 2788531. The next prime is 2788549. The reversal of 2788538 is 8358872.

2788538 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., 2111209 + 677329 = 1453^2 + 823^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2788495 and 2788504.

It is not an unprimeable number, because it can be changed into a prime (2788531) 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, 697133 + ... + 697136.

2^2788538 is an apocalyptic number.

2788538 is a deficient number, since it is larger than the sum of its proper divisors (1394272).

2788538 is a wasteful number, since it uses less digits than its factorization.

2788538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394271.

The product of its digits is 107520, while the sum is 41.

The square root of 2788538 is about 1669.8916132492. The cubic root of 2788538 is about 140.7533874737.

The spelling of 2788538 in words is "two million, seven hundred eighty-eight thousand, five hundred thirty-eight".