2886640 has 20 divisors (see below), whose sum is σ = 6711624. Its totient is φ = 1154624.

The previous prime is 2886619. The next prime is 2886643. The reversal of 2886640 is 466882.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 2886596 and 2886605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2886643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17962 + ... + 18121.

2^2886640 is an apocalyptic number.

2886640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2886640 is an abundant number, since it is smaller than the sum of its proper divisors (3824984).

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

2886640 is a wasteful number, since it uses less digits than its factorization.

2886640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36096 (or 36090 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 2886640 is about 1699.0114773008. The cubic root of 2886640 is about 142.3849897910.

It can be divided in two parts, 28 and 86640, that added together give a palindrome (86668).

The spelling of 2886640 in words is "two million, eight hundred eighty-six thousand, six hundred forty".