6402650 has 12 divisors (see below), whose sum is σ = 11909022. Its totient is φ = 2561040.

The previous prime is 6402631. The next prime is 6402653. The reversal of 6402650 is 562046.

It can be written as a sum of positive squares in 3 ways, for example, as 5285401 + 1117249 = 2299^2 + 1057^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6402653) 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 5 ways as a sum of consecutive naturals, for example, 63977 + ... + 64076.

Almost surely, 2^6402650 is an apocalyptic number.

6402650 is a deficient number, since it is larger than the sum of its proper divisors (5506372).

6402650 is a wasteful number, since it uses less digits than its factorization.

6402650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128065 (or 128060 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 6402650 is about 2530.3458261669. The cubic root of 6402650 is about 185.6891752468.

Adding to 6402650 its reverse (562046), we get a palindrome (6964696).

The spelling of 6402650 in words is "six million, four hundred two thousand, six hundred fifty".