2640547 has 8 divisors (see below), whose sum is σ = 3250016. Its totient is φ = 2089152.

The previous prime is 2640527. The next prime is 2640551. The reversal of 2640547 is 7450462.

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

It is a de Polignac number, because none of the positive numbers 2^k-2640547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2640527) 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, 14418 + ... + 14599.

It is an arithmetic number, because the mean of its divisors is an integer number (406252).

2^2640547 is an apocalyptic number.

2640547 is a deficient number, since it is larger than the sum of its proper divisors (609469).

2640547 is a wasteful number, since it uses less digits than its factorization.

2640547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29037.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 2640547 is about 1624.9759998228. The cubic root of 2640547 is about 138.2180093994.

The spelling of 2640547 in words is "two million, six hundred forty thousand, five hundred forty-seven".