531994090 has 24 divisors (see below), whose sum is σ = 1017237132. Its totient is φ = 200279040.

The previous prime is 531994079. The next prime is 531994093. The reversal of 531994090 is 90499135.

It can be written as a sum of positive squares in 6 ways, for example, as 445336609 + 86657481 = 21103^2 + 9309^2 .

It is not an unprimeable number, because it can be changed into a prime (531994093) 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 11 ways as a sum of consecutive naturals, for example, 89151 + ... + 94930.

Almost surely, 2^531994090 is an apocalyptic number.

531994090 is a deficient number, since it is larger than the sum of its proper divisors (485243042).

531994090 is a wasteful number, since it uses less digits than its factorization.

531994090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184122 (or 184105 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 531994090 is about 23064.9970734878. The cubic root of 531994090 is about 810.2809014059.

The spelling of 531994090 in words is "five hundred thirty-one million, nine hundred ninety-four thousand, ninety".