2787238 has 4 divisors (see below), whose sum is σ = 4180860. Its totient is φ = 1393618.

The previous prime is 2787233. The next prime is 2787251. The reversal of 2787238 is 8327872.

2787238 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 is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2787197 and 2787206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2787233) 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, 696808 + ... + 696811.

It is an arithmetic number, because the mean of its divisors is an integer number (1045215).

2^2787238 is an apocalyptic number.

2787238 is a deficient number, since it is larger than the sum of its proper divisors (1393622).

2787238 is a wasteful number, since it uses less digits than its factorization.

2787238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393621.

The product of its digits is 37632, while the sum is 37.

The square root of 2787238 is about 1669.5023210526. The cubic root of 2787238 is about 140.7315112736.

It can be divided in two parts, 2787 and 238, that added together give a square (3025 = 55²).

The spelling of 2787238 in words is "two million, seven hundred eighty-seven thousand, two hundred thirty-eight".