128532992 has 40 divisors (see below), whose sum is σ = 293510976. Its totient is φ = 55084032.

The previous prime is 128532983. The next prime is 128532997. The reversal of 128532992 is 299235821.

It is not an unprimeable number, because it can be changed into a prime (128532997) 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, 14348 + ... + 21515.

Almost surely, 2^128532992 is an apocalyptic number.

It is an amenable number.

128532992 is an abundant number, since it is smaller than the sum of its proper divisors (164977984).

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

128532992 is an frugal number, since it uses more digits than its factorization.

128532992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35888 (or 35872 counting only the distinct ones).

The product of its digits is 77760, while the sum is 41.

The square root of 128532992 is about 11337.2391700978. The cubic root of 128532992 is about 504.6669594474. Note that the first 3 decimals are identical.

The spelling of 128532992 in words is "one hundred twenty-eight million, five hundred thirty-two thousand, nine hundred ninety-two".