6598440 has 48 divisors (see below), whose sum is σ = 21446100. Its totient is φ = 1759488.

The previous prime is 6598439. The next prime is 6598481. The reversal of 6598440 is 448956.

It can be written as a sum of positive squares in 2 ways, for example, as 6563844 + 34596 = 2562^2 + 186^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 6598395 and 6598404.

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 11 ways as a sum of consecutive naturals, for example, 8805 + ... + 9524.

Almost surely, 2^6598440 is an apocalyptic number.

6598440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6598440 is an abundant number, since it is smaller than the sum of its proper divisors (14847660).

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

6598440 is a wasteful number, since it uses less digits than its factorization.

6598440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18346 (or 18339 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 6598440 is about 2568.7428832018. The cubic root of 6598440 is about 187.5629655195.

The spelling of 6598440 in words is "six million, five hundred ninety-eight thousand, four hundred forty".