6246640 has 40 divisors (see below), whose sum is σ = 14673168. Its totient is φ = 2472960.

The previous prime is 6246623. The next prime is 6246671. The reversal of 6246640 is 466426.

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

It is a super-2 number, since 2×6246640² = 78041022579200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 6246599 and 6246608.

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, 8695 + ... + 9385.

Almost surely, 2^6246640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6246640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7336584).

6246640 is an abundant number, since it is smaller than the sum of its proper divisors (8426528).

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

6246640 is a wasteful number, since it uses less digits than its factorization.

6246640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817 (or 811 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 6246640 is about 2499.3279096589. The cubic root of 6246640 is about 184.1685600928.

It can be divided in two parts, 6246 and 640, that added together give a palindrome (6886).

The spelling of 6246640 in words is "six million, two hundred forty-six thousand, six hundred forty".