5640878 has 8 divisors (see below), whose sum is σ = 8497440. Its totient is φ = 2808400.

The previous prime is 5640871. The next prime is 5640881. The reversal of 5640878 is 8780465.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×5640878² = 63639009221768, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5640871) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5423 + ... + 6378.

It is an arithmetic number, because the mean of its divisors is an integer number (1062180).

Almost surely, 2^5640878 is an apocalyptic number.

5640878 is a deficient number, since it is larger than the sum of its proper divisors (2856562).

5640878 is a wasteful number, since it uses less digits than its factorization.

5640878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12042.

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 5640878 is about 2375.0532625607. The cubic root of 5640878 is about 178.0118453591.

The spelling of 5640878 in words is "five million, six hundred forty thousand, eight hundred seventy-eight".