6446490 has 16 divisors (see below), whose sum is σ = 15471648. Its totient is φ = 1719056.

The previous prime is 6446483. The next prime is 6446507. The reversal of 6446490 is 946446.

It is an Ulam number.

It is a Curzon number.

It is a nialpdrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107412 + ... + 107471.

It is an arithmetic number, because the mean of its divisors is an integer number (966978).

Almost surely, 2^6446490 is an apocalyptic number.

6446490 is an abundant number, since it is smaller than the sum of its proper divisors (9025158).

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

6446490 is a wasteful number, since it uses less digits than its factorization.

6446490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214893.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 6446490 is about 2538.9938952270. The cubic root of 6446490 is about 186.1120263975.

The spelling of 6446490 in words is "six million, four hundred forty-six thousand, four hundred ninety".