1528809323 has 4 divisors (see below), whose sum is σ = 1538547120. Its totient is φ = 1519071528.

The previous prime is 1528809311. The next prime is 1528809329. The reversal of 1528809323 is 3239088251.

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

It is a cyclic number.

It is not a de Polignac number, because 1528809323 - 2⁸ = 1528809067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1528809329) 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, 4868663 + ... + 4868976.

It is an arithmetic number, because the mean of its divisors is an integer number (384636780).

Almost surely, 2^1528809323 is an apocalyptic number.

1528809323 is a deficient number, since it is larger than the sum of its proper divisors (9737797).

1528809323 is an equidigital number, since it uses as much as digits as its factorization.

1528809323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9737796.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 1528809323 is about 39099.9913427100. The cubic root of 1528809323 is about 1151.9963617406.

The spelling of 1528809323 in words is "one billion, five hundred twenty-eight million, eight hundred nine thousand, three hundred twenty-three".