5661856 has 12 divisors (see below), whose sum is σ = 11146842. Its totient is φ = 2830912.

The previous prime is 5661839. The next prime is 5661893. The reversal of 5661856 is 6581665.

It can be written as a sum of positive squares in only one way, i.e., 3459600 + 2202256 = 1860^2 + 1484^2 .

It is a super-2 number, since 2×5661856² = 64113226729472, 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, 88435 + ... + 88498.

Almost surely, 2^5661856 is an apocalyptic number.

It is an amenable number.

5661856 is a deficient number, since it is larger than the sum of its proper divisors (5484986).

5661856 is a wasteful number, since it uses less digits than its factorization.

5661856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176943 (or 176935 counting only the distinct ones).

The product of its digits is 43200, while the sum is 37.

The square root of 5661856 is about 2379.4654861964. The cubic root of 5661856 is about 178.2322432474.

The spelling of 5661856 in words is "five million, six hundred sixty-one thousand, eight hundred fifty-six".