2891368 has 8 divisors (see below), whose sum is σ = 5421330. Its totient is φ = 1445680.

The previous prime is 2891359. The next prime is 2891381. The reversal of 2891368 is 8631982.

It can be written as a sum of positive squares in only one way, i.e., 1855044 + 1036324 = 1362^2 + 1018^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×2891368² = 16720017822848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180703 + ... + 180718.

2^2891368 is an apocalyptic number.

It is an amenable number.

2891368 is a deficient number, since it is larger than the sum of its proper divisors (2529962).

2891368 is a wasteful number, since it uses less digits than its factorization.

2891368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361427 (or 361423 counting only the distinct ones).

The product of its digits is 20736, while the sum is 37.

The square root of 2891368 is about 1700.4023053384. The cubic root of 2891368 is about 142.4626843915.

The spelling of 2891368 in words is "two million, eight hundred ninety-one thousand, three hundred sixty-eight".