2640847 has 8 divisors (see below), whose sum is σ = 2910672. Its totient is φ = 2376000.

The previous prime is 2640823. The next prime is 2640853. The reversal of 2640847 is 7480462.

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

It is not a de Polignac number, because 2640847 - 2¹⁹ = 2116559 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 (2640857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78 + ... + 2299.

It is an arithmetic number, because the mean of its divisors is an integer number (363834).

2^2640847 is an apocalyptic number.

2640847 is a deficient number, since it is larger than the sum of its proper divisors (269825).

2640847 is a wasteful number, since it uses less digits than its factorization.

2640847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2489.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 2640847 is about 1625.0683062567. The cubic root of 2640847 is about 138.2232436473.

The spelling of 2640847 in words is "two million, six hundred forty thousand, eight hundred forty-seven".