6739840 has 32 divisors (see below), whose sum is σ = 16113960. Its totient is φ = 2695680.

The previous prime is 6739807. The next prime is 6739877. The reversal of 6739840 is 489376.

It is a tau number, because it is divible by the number of its divisors (32).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 6739840.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4626 + ... + 5905.

Almost surely, 2^6739840 is an apocalyptic number.

It is an amenable number.

6739840 is an abundant number, since it is smaller than the sum of its proper divisors (9374120).

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

6739840 is a wasteful number, since it uses less digits than its factorization.

6739840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10550 (or 10538 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 6739840 is about 2596.1201821179. The cubic root of 6739840 is about 188.8932891452.

The spelling of 6739840 in words is "six million, seven hundred thirty-nine thousand, eight hundred forty".