531694878 has 64 divisors (see below), whose sum is σ = 1257984000. Its totient is φ = 147692160.

The previous prime is 531694861. The next prime is 531694883. The reversal of 531694878 is 878496135.

It is a self number, because there is not a number n which added to its sum of digits gives 531694878.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125763 + ... + 129921.

It is an arithmetic number, because the mean of its divisors is an integer number (19656000).

Almost surely, 2^531694878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531694878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (628992000).

531694878 is an abundant number, since it is smaller than the sum of its proper divisors (726289122).

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

531694878 is a wasteful number, since it uses less digits than its factorization.

531694878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4337.

The product of its digits is 1451520, while the sum is 51.

The square root of 531694878 is about 23058.5098824707. The cubic root of 531694878 is about 810.1289628530.

The spelling of 531694878 in words is "five hundred thirty-one million, six hundred ninety-four thousand, eight hundred seventy-eight".