2640238 has 4 divisors (see below), whose sum is σ = 3960360. Its totient is φ = 1320118.

The previous prime is 2640227. The next prime is 2640251. The reversal of 2640238 is 8320462.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660058 + ... + 660061.

It is an arithmetic number, because the mean of its divisors is an integer number (990090).

2^2640238 is an apocalyptic number.

2640238 is a deficient number, since it is larger than the sum of its proper divisors (1320122).

2640238 is a wasteful number, since it uses less digits than its factorization.

2640238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320121.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 2640238 is about 1624.8809187137. The cubic root of 2640238 is about 138.2126177096.

The spelling of 2640238 in words is "two million, six hundred forty thousand, two hundred thirty-eight".