6446040 has 32 divisors (see below), whose sum is σ = 19338480. Its totient is φ = 1718912.

The previous prime is 6446023. The next prime is 6446051. The reversal of 6446040 is 406446.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 6446040.

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, 26739 + ... + 26978.

Almost surely, 2^6446040 is an apocalyptic number.

6446040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6446040 is an abundant number, since it is smaller than the sum of its proper divisors (12892440).

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

6446040 is a wasteful number, since it uses less digits than its factorization.

6446040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53731 (or 53727 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 6446040 is about 2538.9052759014. The cubic root of 6446040 is about 186.1076957534.

The spelling of 6446040 in words is "six million, four hundred forty-six thousand, forty".