87839972 has 12 divisors (see below), whose sum is σ = 167694576. Its totient is φ = 39927240.

The previous prime is 87839953. The next prime is 87839977. The reversal of 87839972 is 27993878.

It is not an unprimeable number, because it can be changed into a prime (87839977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 998138 + ... + 998225.

It is an arithmetic number, because the mean of its divisors is an integer number (13974548).

Almost surely, 2^87839972 is an apocalyptic number.

It is an amenable number.

87839972 is a deficient number, since it is larger than the sum of its proper divisors (79854604).

87839972 is a wasteful number, since it uses less digits than its factorization.

87839972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1996378 (or 1996376 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 53.

The square root of 87839972 is about 9372.2981173243. The cubic root of 87839972 is about 444.5262339939.

The spelling of 87839972 in words is "eighty-seven million, eight hundred thirty-nine thousand, nine hundred seventy-two".