5661828 has 18 divisors (see below), whose sum is σ = 14311934. Its totient is φ = 1887264.

The previous prime is 5661823. The next prime is 5661839. The reversal of 5661828 is 8281665.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4334724 + 1327104 = 2082^2 + 1152^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 157273 = 5661828 / (5 + 6 + 6 + 1 + 8 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 5661792 and 5661801.

It is not an unprimeable number, because it can be changed into a prime (5661823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78601 + ... + 78672.

Almost surely, 2^5661828 is an apocalyptic number.

It is an amenable number.

5661828 is an abundant number, since it is smaller than the sum of its proper divisors (8650106).

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

5661828 is a wasteful number, since it uses less digits than its factorization.

5661828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157283 (or 157278 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 5661828 is about 2379.4596025148. The cubic root of 5661828 is about 178.2319494385.

The spelling of 5661828 in words is "five million, six hundred sixty-one thousand, eight hundred twenty-eight".