2640803 has 4 divisors (see below), whose sum is σ = 2880888. Its totient is φ = 2400720.

The previous prime is 2640779. The next prime is 2640821. The reversal of 2640803 is 3080462.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2640803 - 2⁶ = 2640739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2640823) 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, 120026 + ... + 120047.

It is an arithmetic number, because the mean of its divisors is an integer number (720222).

2^2640803 is an apocalyptic number.

2640803 is a deficient number, since it is larger than the sum of its proper divisors (240085).

2640803 is a wasteful number, since it uses less digits than its factorization.

2640803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240084.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 2640803 is about 1625.0547683078. The cubic root of 2640803 is about 138.2224759824. Note that the first 3 decimals are identical.

It can be divided in two parts, 2640 and 803, that added together give a palindrome (3443).

The spelling of 2640803 in words is "two million, six hundred forty thousand, eight hundred three".