2663540 has 24 divisors (see below), whose sum is σ = 6102432. Its totient is φ = 968480.

The previous prime is 2663539. The next prime is 2663567. The reversal of 2663540 is 453662.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5834 + ... + 6273.

It is an arithmetic number, because the mean of its divisors is an integer number (254268).

2^2663540 is an apocalyptic number.

2663540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2663540 is an abundant number, since it is smaller than the sum of its proper divisors (3438892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2663540 is a wasteful number, since it uses less digits than its factorization.

2663540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12127 (or 12125 counting only the distinct ones).

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

The square root of 2663540 is about 1632.0355388287. The cubic root of 2663540 is about 138.6180359344.

The spelling of 2663540 in words is "two million, six hundred sixty-three thousand, five hundred forty".