1309839528 has 64 divisors (see below), whose sum is σ = 3579102720. Its totient is φ = 397670400.

The previous prime is 1309839527. The next prime is 1309839541. The reversal of 1309839528 is 8259389031.

It is a happy number.

It is a super-2 number, since 2×1309839528² = 3431359178222525568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1309839521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39133 + ... + 64428.

It is an arithmetic number, because the mean of its divisors is an integer number (55923480).

Almost surely, 2^1309839528 is an apocalyptic number.

It is an amenable number.

1309839528 is an abundant number, since it is smaller than the sum of its proper divisors (2269263192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1309839528 is a wasteful number, since it uses less digits than its factorization.

1309839528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103618 (or 103614 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 1309839528 is about 36191.7052375265. The cubic root of 1309839528 is about 1094.1395011869.

The spelling of 1309839528 in words is "one billion, three hundred nine million, eight hundred thirty-nine thousand, five hundred twenty-eight".