2640824 has 8 divisors (see below), whose sum is σ = 4951560. Its totient is φ = 1320408.

The previous prime is 2640823. The next prime is 2640853. The reversal of 2640824 is 4280462.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 2640793 and 2640802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165044 + ... + 165059.

It is an arithmetic number, because the mean of its divisors is an integer number (618945).

2^2640824 is an apocalyptic number.

It is an amenable number.

2640824 is a deficient number, since it is larger than the sum of its proper divisors (2310736).

2640824 is a wasteful number, since it uses less digits than its factorization.

2640824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330109 (or 330105 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 2640824 is about 1625.0612296157. The cubic root of 2640824 is about 138.2228423690. Note that the first 3 decimals are identical.

The spelling of 2640824 in words is "two million, six hundred forty thousand, eight hundred twenty-four".