6367440 has 80 divisors (see below), whose sum is σ = 20230848. Its totient is φ = 1655808.

The previous prime is 6367433. The next prime is 6367507. The reversal of 6367440 is 447636.

It is a tau number, because it is divible by the number of its divisors (80).

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 = 6367398 and 6367407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10012 + ... + 10628.

Almost surely, 2^6367440 is an apocalyptic number.

6367440 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 6367440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10115424).

6367440 is an abundant number, since it is smaller than the sum of its proper divisors (13863408).

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

6367440 is a wasteful number, since it uses less digits than its factorization.

6367440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676 (or 670 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 6367440 is about 2523.3786873951. The cubic root of 6367440 is about 185.3481634470.

The spelling of 6367440 in words is "six million, three hundred sixty-seven thousand, four hundred forty".