5641640 has 16 divisors (see below), whose sum is σ = 12693780. Its totient is φ = 2256640.

The previous prime is 5641633. The next prime is 5641661. The reversal of 5641640 is 461465.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4605316 + 1036324 = 2146^2 + 1018^2 .

It is a super-3 number, since 3×5641640³ (a number of 21 digits) contains 333 as substring.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70481 + ... + 70560.

Almost surely, 2^5641640 is an apocalyptic number.

It is an amenable number.

5641640 is an abundant number, since it is smaller than the sum of its proper divisors (7052140).

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

5641640 is a wasteful number, since it uses less digits than its factorization.

5641640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141052 (or 141048 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 5641640 is about 2375.2136745986. The cubic root of 5641640 is about 178.0198605959.

The spelling of 5641640 in words is "five million, six hundred forty-one thousand, six hundred forty".