6499400 has 24 divisors (see below), whose sum is σ = 15111570. Its totient is φ = 2599680.

The previous prime is 6499399. The next prime is 6499439. The reversal of 6499400 is 49946.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 5692996 + 806404 = 2386^2 + 898^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16049 + ... + 16448.

Almost surely, 2^6499400 is an apocalyptic number.

It is an amenable number.

6499400 is an abundant number, since it is smaller than the sum of its proper divisors (8612170).

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

6499400 is a wasteful number, since it uses less digits than its factorization.

6499400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32513 (or 32504 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 6499400 is about 2549.3920843997. The cubic root of 6499400 is about 186.6198153393.

The spelling of 6499400 in words is "six million, four hundred ninety-nine thousand, four hundred".