6198640 has 40 divisors (see below), whose sum is σ = 16472160. Its totient is φ = 2125056.

The previous prime is 6198631. The next prime is 6198641. The reversal of 6198640 is 468916.

It is a tau number, because it is divible by the number of its divisors (40).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6198596 and 6198605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6198641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4975 + ... + 6094.

It is an arithmetic number, because the mean of its divisors is an integer number (411804).

Almost surely, 2^6198640 is an apocalyptic number.

It is an amenable number.

6198640 is an abundant number, since it is smaller than the sum of its proper divisors (10273520).

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

6198640 is a wasteful number, since it uses less digits than its factorization.

6198640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11089 (or 11083 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 6198640 is about 2489.7068100481. The cubic root of 6198640 is about 183.6956215291.

It can be divided in two parts, 61986 and 40, that added together give a palindrome (62026).

The spelling of 6198640 in words is "six million, one hundred ninety-eight thousand, six hundred forty".