5640540 has 24 divisors (see below), whose sum is σ = 15793680. Its totient is φ = 1504128.

The previous prime is 5640533. The next prime is 5640541. The reversal of 5640540 is 450465.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 5640540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5640541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46945 + ... + 47064.

It is an arithmetic number, because the mean of its divisors is an integer number (658070).

Almost surely, 2^5640540 is an apocalyptic number.

It is an amenable number.

5640540 is an abundant number, since it is smaller than the sum of its proper divisors (10153140).

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

5640540 is a wasteful number, since it uses less digits than its factorization.

5640540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94021 (or 94019 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 5640540 is about 2374.9821051957. The cubic root of 5640540 is about 178.0082898130.

The spelling of 5640540 in words is "five million, six hundred forty thousand, five hundred forty".