6139440 has 60 divisors (see below), whose sum is σ = 20620704. Its totient is φ = 1636992.

The previous prime is 6139423. The next prime is 6139453. The reversal of 6139440 is 449316.

6139440 is a `hidden beast` number, since 613 + 9 + 4 + 40 = 666.

6139440 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (60).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3544 + ... + 4983.

Almost surely, 2^6139440 is an apocalyptic number.

6139440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6139440 is an abundant number, since it is smaller than the sum of its proper divisors (14481264).

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

6139440 is a wasteful number, since it uses less digits than its factorization.

6139440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8546 (or 8537 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 6139440 is about 2477.7893372924. The cubic root of 6139440 is about 183.1089559886.

The spelling of 6139440 in words is "six million, one hundred thirty-nine thousand, four hundred forty".