5640402 has 8 divisors (see below), whose sum is σ = 11280816. Its totient is φ = 1880132.

The previous prime is 5640389. The next prime is 5640403. The reversal of 5640402 is 2040465.

It is a happy number.

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

5640402 is an admirable number.

It is a super-3 number, since 3×5640402³ (a number of 21 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (5640403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 470028 + ... + 470039.

It is an arithmetic number, because the mean of its divisors is an integer number (1410102).

Almost surely, 2^5640402 is an apocalyptic number.

5640402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

5640402 is a wasteful number, since it uses less digits than its factorization.

5640402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940072.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 5640402 is about 2374.9530521676. The cubic root of 5640402 is about 178.0068380995.

Adding to 5640402 its reverse (2040465), we get a palindrome (7680867).

The spelling of 5640402 in words is "five million, six hundred forty thousand, four hundred two".