6356640 has 192 divisors, whose sum is σ = 22861440. Its totient is φ = 1474560.

The previous prime is 6356639. The next prime is 6356641. The reversal of 6356640 is 466536.

It is an interprime number because it is at equal distance from previous prime (6356639) and next prime (6356641).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 6356598 and 6356607.

It is not an unprimeable number, because it can be changed into a prime (6356641) 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 31 ways as a sum of consecutive naturals, for example, 155020 + ... + 155060.

It is an arithmetic number, because the mean of its divisors is an integer number (119070).

Almost surely, 2^6356640 is an apocalyptic number.

6356640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6356640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11430720).

6356640 is an abundant number, since it is smaller than the sum of its proper divisors (16504800).

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

6356640 is a wasteful number, since it uses less digits than its factorization.

6356640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95 (or 87 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 6356640 is about 2521.2377912446. The cubic root of 6356640 is about 185.2433126760.

It can be divided in two parts, 6356 and 640, that added together give a palindrome (6996).

The spelling of 6356640 in words is "six million, three hundred fifty-six thousand, six hundred forty".