2640467 has 4 divisors (see below), whose sum is σ = 2647920. Its totient is φ = 2633016.

The previous prime is 2640409. The next prime is 2640497. The reversal of 2640467 is 7640462.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2640467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2640497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3167 + ... + 3912.

It is an arithmetic number, because the mean of its divisors is an integer number (661980).

2^2640467 is an apocalyptic number.

2640467 is a deficient number, since it is larger than the sum of its proper divisors (7453).

2640467 is an equidigital number, since it uses as much as digits as its factorization.

2640467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7452.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 2640467 is about 1624.9513838881. The cubic root of 2640467 is about 138.2166135330.

The spelling of 2640467 in words is "two million, six hundred forty thousand, four hundred sixty-seven".