2649881 has 8 divisors (see below), whose sum is σ = 2882880. Its totient is φ = 2421072.

The previous prime is 2649877. The next prime is 2649887. The reversal of 2649881 is 1889462.

2649881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2649881 - 2² = 2649877 is a prime.

It is a super-2 number, since 2×2649881² = 14043738628322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2649887) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 350 + ... + 2328.

It is an arithmetic number, because the mean of its divisors is an integer number (360360).

2^2649881 is an apocalyptic number.

It is an amenable number.

2649881 is a deficient number, since it is larger than the sum of its proper divisors (232999).

2649881 is a wasteful number, since it uses less digits than its factorization.

2649881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2095.

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

The square root of 2649881 is about 1627.8455086402. The cubic root of 2649881 is about 138.3806789438.

The spelling of 2649881 in words is "two million, six hundred forty-nine thousand, eight hundred eighty-one".