5640398 has 8 divisors (see below), whose sum is σ = 8539992. Its totient is φ = 2793736.

The previous prime is 5640389. The next prime is 5640403. The reversal of 5640398 is 8930465.

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

It is a congruent 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, 12965 + ... + 13392.

It is an arithmetic number, because the mean of its divisors is an integer number (1067499).

Almost surely, 2^5640398 is an apocalyptic number.

5640398 is a deficient number, since it is larger than the sum of its proper divisors (2899594).

5640398 is a wasteful number, since it uses less digits than its factorization.

5640398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26466.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 5640398 is about 2374.9522100455. The cubic root of 5640398 is about 178.0067960205.

The spelling of 5640398 in words is "five million, six hundred forty thousand, three hundred ninety-eight".