2640479 has 8 divisors (see below), whose sum is σ = 2766960. Its totient is φ = 2516416.

The previous prime is 2640409. The next prime is 2640497. The reversal of 2640479 is 9740462.

2640479 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2640479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1859 + ... + 2955.

It is an arithmetic number, because the mean of its divisors is an integer number (345870).

2^2640479 is an apocalyptic number.

2640479 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2640479 is a deficient number, since it is larger than the sum of its proper divisors (126481).

2640479 is a wasteful number, since it uses less digits than its factorization.

2640479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 2640479 is about 1624.9550763021. The cubic root of 2640479 is about 138.2168229148.

The spelling of 2640479 in words is "two million, six hundred forty thousand, four hundred seventy-nine".