2640237 has 8 divisors (see below), whose sum is σ = 3536736. Its totient is φ = 1751952.

The previous prime is 2640227. The next prime is 2640251. The reversal of 2640237 is 7320462.

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

It is not a de Polignac number, because 2640237 - 2¹⁰ = 2639213 is a prime.

2640237 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1258 + ... + 2619.

It is an arithmetic number, because the mean of its divisors is an integer number (442092).

2^2640237 is an apocalyptic number.

It is an amenable number.

2640237 is a deficient number, since it is larger than the sum of its proper divisors (896499).

2640237 is a wasteful number, since it uses less digits than its factorization.

2640237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4107.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 2640237 is about 1624.8806109989. The cubic root of 2640237 is about 138.2126002601.

Adding to 2640237 its reverse (7320462), we get a palindrome (9960699).

The spelling of 2640237 in words is "two million, six hundred forty thousand, two hundred thirty-seven".