2891655 has 24 divisors (see below), whose sum is σ = 5398848. Its totient is φ = 1423296.

The previous prime is 2891639. The next prime is 2891657. The reversal of 2891655 is 5561982.

It is a happy number.

It is not a de Polignac number, because 2891655 - 2⁴ = 2891639 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2891657) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1887 + ... + 3056.

It is an arithmetic number, because the mean of its divisors is an integer number (224952).

2^2891655 is an apocalyptic number.

2891655 is a deficient number, since it is larger than the sum of its proper divisors (2507193).

2891655 is a wasteful number, since it uses less digits than its factorization.

2891655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4967 (or 4964 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 2891655 is about 1700.4866950376. The cubic root of 2891655 is about 142.4673978971.

The spelling of 2891655 in words is "two million, eight hundred ninety-one thousand, six hundred fifty-five".