132639978 has 16 divisors (see below), whose sum is σ = 268914816. Its totient is φ = 43607520.

The previous prime is 132639977. The next prime is 132640021. The reversal of 132639978 is 879936231.

It is not an unprimeable number, because it can be changed into a prime (132639971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150978 + ... + 151853.

It is an arithmetic number, because the mean of its divisors is an integer number (16807176).

Almost surely, 2^132639978 is an apocalyptic number.

132639978 is an abundant number, since it is smaller than the sum of its proper divisors (136274838).

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

132639978 is a wasteful number, since it uses less digits than its factorization.

132639978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302909.

The product of its digits is 489888, while the sum is 48.

The square root of 132639978 is about 11516.9430839959. The cubic root of 132639978 is about 509.9858742723.

The spelling of 132639978 in words is "one hundred thirty-two million, six hundred thirty-nine thousand, nine hundred seventy-eight".