531878634 has 144 divisors (see below), whose sum is σ = 1416175488. Its totient is φ = 143567424.

The previous prime is 531878621. The next prime is 531878681. The reversal of 531878634 is 436878135.

531878634 is a `hidden beast` number, since 5 + 3 + 1 + 8 + 7 + 8 + 634 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 531878634.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 3184819 + ... + 3184985.

It is an arithmetic number, because the mean of its divisors is an integer number (9834552).

Almost surely, 2^531878634 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531878634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (708087744).

531878634 is an abundant number, since it is smaller than the sum of its proper divisors (884296854).

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

531878634 is a wasteful number, since it uses less digits than its factorization.

531878634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369 (or 359 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 531878634 is about 23062.4940975602. The cubic root of 531878634 is about 810.2222801029. Note that the first 4 decimals are identical.

The spelling of 531878634 in words is "five hundred thirty-one million, eight hundred seventy-eight thousand, six hundred thirty-four".