539656840 has 128 divisors (see below), whose sum is σ = 1340776800. Its totient is φ = 194641920.

The previous prime is 539656811. The next prime is 539656849. The reversal of 539656840 is 48656935.

It can be written as a sum of positive squares in 16 ways, for example, as 204547204 + 335109636 = 14302^2 + 18306^2 .

It is not an unprimeable number, because it can be changed into a prime (539656849) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2239120 + ... + 2239360.

Almost surely, 2^539656840 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 539656840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (670388400).

539656840 is an abundant number, since it is smaller than the sum of its proper divisors (801119960).

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

539656840 is a wasteful number, since it uses less digits than its factorization.

539656840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 46.

The square root of 539656840 is about 23230.5152762482. The cubic root of 539656840 is about 814.1527522133.

The spelling of 539656840 in words is "five hundred thirty-nine million, six hundred fifty-six thousand, eight hundred forty".