531640858 has 16 divisors (see below), whose sum is σ = 926832960. Its totient is φ = 223983936.

The previous prime is 531640819. The next prime is 531640859. The reversal of 531640858 is 858046135.

It is a self number, because there is not a number n which added to its sum of digits gives 531640858.

It is not an unprimeable number, because it can be changed into a prime (531640859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320991 + ... + 322642.

It is an arithmetic number, because the mean of its divisors is an integer number (57927060).

Almost surely, 2^531640858 is an apocalyptic number.

531640858 is a deficient number, since it is larger than the sum of its proper divisors (395192102).

531640858 is a wasteful number, since it uses less digits than its factorization.

531640858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643701.

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 531640858 is about 23057.3384847428. The cubic root of 531640858 is about 810.1015256576.

The spelling of 531640858 in words is "five hundred thirty-one million, six hundred forty thousand, eight hundred fifty-eight".