528431139 has 12 divisors (see below), whose sum is σ = 763532016. Its totient is φ = 352175472.

The previous prime is 528431131. The next prime is 528431149. The reversal of 528431139 is 931134825.

It is not a de Polignac number, because 528431139 - 2³ = 528431131 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (528431131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28737 + ... + 43389.

It is an arithmetic number, because the mean of its divisors is an integer number (63627668).

Almost surely, 2^528431139 is an apocalyptic number.

528431139 is a deficient number, since it is larger than the sum of its proper divisors (235100877).

528431139 is a wasteful number, since it uses less digits than its factorization.

528431139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18666 (or 18663 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 528431139 is about 22987.6301301374. The cubic root of 528431139 is about 808.4679362154.

The spelling of 528431139 in words is "five hundred twenty-eight million, four hundred thirty-one thousand, one hundred thirty-nine".