2640046 has 4 divisors (see below), whose sum is σ = 3960072. Its totient is φ = 1320022.

The previous prime is 2640041. The next prime is 2640059. The reversal of 2640046 is 6400462.

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

It is a junction number, because it is equal to n+sod(n) for n = 2639999 and 2640026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660010 + ... + 660013.

It is an arithmetic number, because the mean of its divisors is an integer number (990018).

2^2640046 is an apocalyptic number.

2640046 is a deficient number, since it is larger than the sum of its proper divisors (1320026).

2640046 is a wasteful number, since it uses less digits than its factorization.

2640046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320025.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 2640046 is about 1624.8218363870. The cubic root of 2640046 is about 138.2092673215.

The spelling of 2640046 in words is "two million, six hundred forty thousand, forty-six".