2640235 has 16 divisors (see below), whose sum is σ = 3447360. Its totient is φ = 1929600.

The previous prime is 2640227. The next prime is 2640251. The reversal of 2640235 is 5320462.

It is a happy number.

It is not a de Polignac number, because 2640235 - 2³ = 2640227 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9681 + ... + 9949.

It is an arithmetic number, because the mean of its divisors is an integer number (215460).

2^2640235 is an apocalyptic number.

2640235 is a deficient number, since it is larger than the sum of its proper divisors (807125).

2640235 is a wasteful number, since it uses less digits than its factorization.

2640235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 2640235 is about 1624.8799955689. The cubic root of 2640235 is about 138.2125653610.

Adding to 2640235 its reverse (5320462), we get a palindrome (7960697).

The spelling of 2640235 in words is "two million, six hundred forty thousand, two hundred thirty-five".