2981864 has 8 divisors (see below), whose sum is σ = 5591010. Its totient is φ = 1490928.

The previous prime is 2981857. The next prime is 2981873. The reversal of 2981864 is 4681892.

It can be written as a sum of positive squares in only one way, i.e., 2079364 + 902500 = 1442^2 + 950^2 .

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

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 186359 + ... + 186374.

2^2981864 is an apocalyptic number.

It is an amenable number.

2981864 is a deficient number, since it is larger than the sum of its proper divisors (2609146).

2981864 is a wasteful number, since it uses less digits than its factorization.

2981864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372739 (or 372735 counting only the distinct ones).

The product of its digits is 27648, while the sum is 38.

The square root of 2981864 is about 1726.8074588674. The cubic root of 2981864 is about 143.9337400921.

The spelling of 2981864 in words is "two million, nine hundred eighty-one thousand, eight hundred sixty-four".