1329136428 has 24 divisors (see below), whose sum is σ = 3121861120. Its totient is φ = 440110800.

The previous prime is 1329136399. The next prime is 1329136433. The reversal of 1329136428 is 8246319231.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364948 + ... + 368571.

Almost surely, 2^1329136428 is an apocalyptic number.

It is an amenable number.

1329136428 is an abundant number, since it is smaller than the sum of its proper divisors (1792724692).

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

1329136428 is a wasteful number, since it uses less digits than its factorization.

1329136428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733677 (or 733675 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The square root of 1329136428 is about 36457.3233795351. The cubic root of 1329136428 is about 1099.4863794974.

The spelling of 1329136428 in words is "one billion, three hundred twenty-nine million, one hundred thirty-six thousand, four hundred twenty-eight".