2697640 has 32 divisors (see below), whose sum is σ = 6622560. Its totient is φ = 980800.

The previous prime is 2697637. The next prime is 2697661. The reversal of 2697640 is 467962.

It is a junction number, because it is equal to n+sod(n) for n = 2697596 and 2697605.

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, 2626 + ... + 3505.

It is an arithmetic number, because the mean of its divisors is an integer number (206955).

2^2697640 is an apocalyptic number.

2697640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2697640 is an abundant number, since it is smaller than the sum of its proper divisors (3924920).

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

2697640 is a wasteful number, since it uses less digits than its factorization.

2697640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6153 (or 6149 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 2697640 is about 1642.4493903923. The cubic root of 2697640 is about 139.2070822574.

The spelling of 2697640 in words is "two million, six hundred ninety-seven thousand, six hundred forty".