5641812 has 60 divisors (see below), whose sum is σ = 16099776. Its totient is φ = 1708560.

The previous prime is 5641793. The next prime is 5641819. The reversal of 5641812 is 2181465.

5641812 is a `hidden beast` number, since 5 + 641 + 8 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5641819) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2773 + ... + 4355.

Almost surely, 2^5641812 is an apocalyptic number.

5641812 is the 1188-th decagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5641812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8049888).

5641812 is an abundant number, since it is smaller than the sum of its proper divisors (10457964).

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

5641812 is a wasteful number, since it uses less digits than its factorization.

5641812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610 (or 1599 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 5641812 is about 2375.2498815914. The cubic root of 5641812 is about 178.0216697096.

The spelling of 5641812 in words is "five million, six hundred forty-one thousand, eight hundred twelve".