539131840 has 168 divisors, whose sum is σ = 1463222880. Its totient is φ = 188061696.

The previous prime is 539131771. The next prime is 539131861. The reversal of 539131840 is 48131935.

It is a junction number, because it is equal to n+sod(n) for n = 539131796 and 539131805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1501581 + ... + 1501939.

It is an arithmetic number, because the mean of its divisors is an integer number (8709660).

Almost surely, 2^539131840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 539131840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (731611440).

539131840 is an abundant number, since it is smaller than the sum of its proper divisors (924091040).

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

539131840 is a wasteful number, since it uses less digits than its factorization.

539131840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 539131840 is about 23219.2127342854. The cubic root of 539131840 is about 813.8886529776. Note that the first 3 decimals are identical.

The spelling of 539131840 in words is "five hundred thirty-nine million, one hundred thirty-one thousand, eight hundred forty".