6440120 has 32 divisors (see below), whose sum is σ = 14573520. Its totient is φ = 2561280.

The previous prime is 6440113. The next prime is 6440131. The reversal of 6440120 is 210446.

It is a super-2 number, since 2×6440120² = 82950291228800, which contains 22 as substring.

It is a congruent number.

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, 8975 + ... + 9665.

Almost surely, 2^6440120 is an apocalyptic number.

It is an amenable number.

6440120 is an abundant number, since it is smaller than the sum of its proper divisors (8133400).

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

6440120 is a wasteful number, since it uses less digits than its factorization.

6440120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935 (or 931 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 6440120 is about 2537.7391512920. The cubic root of 6440120 is about 186.0507049491.

Adding to 6440120 its reverse (210446), we get a palindrome (6650566).

The spelling of 6440120 in words is "six million, four hundred forty thousand, one hundred twenty".