6299640 has 128 divisors (see below), whose sum is σ = 22176000. Its totient is φ = 1586304.

The previous prime is 6299627. The next prime is 6299651. The reversal of 6299640 is 469926.

6299640 is a `hidden beast` number, since 6 + 2 + 9 + 9 + 640 = 666.

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

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 6299595 and 6299604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20367 + ... + 20673.

It is an arithmetic number, because the mean of its divisors is an integer number (173250).

Almost surely, 2^6299640 is an apocalyptic number.

6299640 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 6299640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11088000).

6299640 is an abundant number, since it is smaller than the sum of its proper divisors (15876360).

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

6299640 is a wasteful number, since it uses less digits than its factorization.

6299640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346 (or 336 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 6299640 is about 2509.9083648612. The cubic root of 6299640 is about 184.6879570449.

It can be divided in two parts, 62996 and 40, that added together give a palindrome (63036).

The spelling of 6299640 in words is "six million, two hundred ninety-nine thousand, six hundred forty".