2640442 has 8 divisors (see below), whose sum is σ = 4526496. Its totient is φ = 1131612.

The previous prime is 2640409. The next prime is 2640497. The reversal of 2640442 is 2440462.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94288 + ... + 94315.

It is an arithmetic number, because the mean of its divisors is an integer number (565812).

2^2640442 is an apocalyptic number.

2640442 is a deficient number, since it is larger than the sum of its proper divisors (1886054).

2640442 is a wasteful number, since it uses less digits than its factorization.

2640442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188612.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 2640442 is about 1624.9436913321. The cubic root of 2640442 is about 138.2161773190.

The spelling of 2640442 in words is "two million, six hundred forty thousand, four hundred forty-two".