2891660 has 12 divisors (see below), whose sum is σ = 6072528. Its totient is φ = 1156656.

The previous prime is 2891657. The next prime is 2891671. The reversal of 2891660 is 661982.

2891660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72272 + ... + 72311.

It is an arithmetic number, because the mean of its divisors is an integer number (506044).

2^2891660 is an apocalyptic number.

2891660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2891660 is an abundant number, since it is smaller than the sum of its proper divisors (3180868).

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

2891660 is a wasteful number, since it uses less digits than its factorization.

2891660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144592 (or 144590 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 2891660 is about 1700.4881652043. The cubic root of 2891660 is about 142.4674800112.

The spelling of 2891660 in words is "two million, eight hundred ninety-one thousand, six hundred sixty".