6458840 has 16 divisors (see below), whose sum is σ = 14532480. Its totient is φ = 2583520.

The previous prime is 6458813. The next prime is 6458843. The reversal of 6458840 is 488546.

It is a super-2 number, since 2×6458840² = 83433228291200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6458840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6458843) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 80696 + ... + 80775.

It is an arithmetic number, because the mean of its divisors is an integer number (908280).

Almost surely, 2^6458840 is an apocalyptic number.

It is an amenable number.

6458840 is an abundant number, since it is smaller than the sum of its proper divisors (8073640).

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

6458840 is a wasteful number, since it uses less digits than its factorization.

6458840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161482 (or 161478 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 6458840 is about 2541.4247972348. The cubic root of 6458840 is about 186.2307999366.

The spelling of 6458840 in words is "six million, four hundred fifty-eight thousand, eight hundred forty".