6840064 has 72 divisors (see below), whose sum is σ = 17071488. Its totient is φ = 2657280.

The previous prime is 6840061. The next prime is 6840073. The reversal of 6840064 is 4600486.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6840061) 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, 19539 + ... + 19885.

It is an arithmetic number, because the mean of its divisors is an integer number (237104).

Almost surely, 2^6840064 is an apocalyptic number.

6840064 is a gapful number since it is divisible by the number (64) 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 6840064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8535744).

6840064 is an abundant number, since it is smaller than the sum of its proper divisors (10231424).

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

6840064 is a wasteful number, since it uses less digits than its factorization.

6840064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 6840064 is about 2615.3516016016. The cubic root of 6840064 is about 189.8249912036.

The spelling of 6840064 in words is "six million, eight hundred forty thousand, sixty-four".