2640022 has 48 divisors (see below), whose sum is σ = 5253120. Its totient is φ = 982800.

The previous prime is 2640017. The next prime is 2640023. The reversal of 2640022 is 2200462.

It is a junction number, because it is equal to n+sod(n) for n = 2639978 and 2640005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33379 + ... + 33457.

It is an arithmetic number, because the mean of its divisors is an integer number (109440).

2^2640022 is an apocalyptic number.

2640022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2640022 is a deficient number, since it is larger than the sum of its proper divisors (2613098).

2640022 is a wasteful number, since it uses less digits than its factorization.

2640022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 2640022 is about 1624.8144509451. The cubic root of 2640022 is about 138.2088485116.

Adding to 2640022 its reverse (2200462), we get a palindrome (4840484).

The spelling of 2640022 in words is "two million, six hundred forty thousand, twenty-two".