6340402 has 4 divisors (see below), whose sum is σ = 9510606. Its totient is φ = 3170200.

The previous prime is 6340391. The next prime is 6340403. The reversal of 6340402 is 2040436.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 4704561 + 1635841 = 2169^2 + 1279^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6340402.

It is not an unprimeable number, because it can be changed into a prime (6340403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1585099 + ... + 1585102.

Almost surely, 2^6340402 is an apocalyptic number.

6340402 is a deficient number, since it is larger than the sum of its proper divisors (3170204).

6340402 is a wasteful number, since it uses less digits than its factorization.

6340402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3170203.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 6340402 is about 2518.0154884353. The cubic root of 6340402 is about 185.0854438521.

Adding to 6340402 its reverse (2040436), we get a palindrome (8380838).

The spelling of 6340402 in words is "six million, three hundred forty thousand, four hundred two".