2640356 has 12 divisors (see below), whose sum is σ = 4642092. Its totient is φ = 1314048.

The previous prime is 2640349. The next prime is 2640361. The reversal of 2640356 is 6530462.

It can be written as a sum of positive squares in 2 ways, for example, as 774400 + 1865956 = 880^2 + 1366^2 .

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485 + ... + 2348.

It is an arithmetic number, because the mean of its divisors is an integer number (386841).

2^2640356 is an apocalyptic number.

It is an amenable number.

2640356 is a deficient number, since it is larger than the sum of its proper divisors (2001736).

2640356 is a wasteful number, since it uses less digits than its factorization.

2640356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3070 (or 3068 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 2640356 is about 1624.9172286612. The cubic root of 2640356 is about 138.2146767217.

The spelling of 2640356 in words is "two million, six hundred forty thousand, three hundred fifty-six".