528239623 has 4 divisors (see below), whose sum is σ = 559312560. Its totient is φ = 497166688.

The previous prime is 528239617. The next prime is 528239641. The reversal of 528239623 is 326932825.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-528239623 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (528239683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15536443 + ... + 15536476.

It is an arithmetic number, because the mean of its divisors is an integer number (139828140).

Almost surely, 2^528239623 is an apocalyptic number.

528239623 is a deficient number, since it is larger than the sum of its proper divisors (31072937).

528239623 is a wasteful number, since it uses less digits than its factorization.

528239623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31072936.

The product of its digits is 155520, while the sum is 40.

The square root of 528239623 is about 22983.4641209718. The cubic root of 528239623 is about 808.3702550842.

The spelling of 528239623 in words is "five hundred twenty-eight million, two hundred thirty-nine thousand, six hundred twenty-three".