5661936 has 120 divisors (see below), whose sum is σ = 18686304. Its totient is φ = 1566720.

The previous prime is 5661923. The next prime is 5661941. The reversal of 5661936 is 6391665.

5661936 is a `hidden beast` number, since 5 + 6 + 619 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 5661936.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 41260 + ... + 41396.

Almost surely, 2^5661936 is an apocalyptic number.

5661936 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5661936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9343152).

5661936 is an abundant number, since it is smaller than the sum of its proper divisors (13024368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5661936 is a wasteful number, since it uses less digits than its factorization.

5661936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 190 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 5661936 is about 2379.4822966351. The cubic root of 5661936 is about 178.2330826961.

The spelling of 5661936 in words is "five million, six hundred sixty-one thousand, nine hundred thirty-six".