6131840 has 128 divisors (see below), whose sum is σ = 17478720. Its totient is φ = 2027520.

The previous prime is 6131821. The next prime is 6131857. The reversal of 6131840 is 481316.

It is a tau number, because it is divible by the number of its divisors (128).

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, 91487 + ... + 91553.

Almost surely, 2^6131840 is an apocalyptic number.

6131840 is the 1430-th octagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6131840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8739360).

6131840 is an abundant number, since it is smaller than the sum of its proper divisors (11346880).

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

6131840 is a wasteful number, since it uses less digits than its factorization.

6131840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 6131840 is about 2476.2552372484. The cubic root of 6131840 is about 183.0333680581.

The spelling of 6131840 in words is "six million, one hundred thirty-one thousand, eight hundred forty".