531878840 has 16 divisors (see below), whose sum is σ = 1196727480. Its totient is φ = 212751520.

The previous prime is 531878833. The next prime is 531878849. The reversal of 531878840 is 48878135.

It is a junction number, because it is equal to n+sod(n) for n = 531878791 and 531878800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531878849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6648446 + ... + 6648525.

Almost surely, 2^531878840 is an apocalyptic number.

It is an amenable number.

531878840 is an abundant number, since it is smaller than the sum of its proper divisors (664848640).

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

531878840 is a wasteful number, since it uses less digits than its factorization.

531878840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13296982 (or 13296978 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 44.

The square root of 531878840 is about 23062.4985636856. The cubic root of 531878840 is about 810.2223847043. Note that the first 3 decimals are identical.

The spelling of 531878840 in words is "five hundred thirty-one million, eight hundred seventy-eight thousand, eight hundred forty".