6447790 has 16 divisors (see below), whose sum is σ = 11699712. Its totient is φ = 2558304.

The previous prime is 6447787. The next prime is 6447817. The reversal of 6447790 is 977446.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1269 + ... + 3808.

It is an arithmetic number, because the mean of its divisors is an integer number (731232).

Almost surely, 2^6447790 is an apocalyptic number.

6447790 is the 1270-th decagonal number.

6447790 is a deficient number, since it is larger than the sum of its proper divisors (5251922).

6447790 is a wasteful number, since it uses less digits than its factorization.

6447790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5211.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 6447790 is about 2539.2498892389. The cubic root of 6447790 is about 186.1245360150.

The spelling of 6447790 in words is "six million, four hundred forty-seven thousand, seven hundred ninety".