87985986 has 16 divisors (see below), whose sum is σ = 191969568. Its totient is φ = 26662400.

The previous prime is 87985949. The next prime is 87986011. The reversal of 87985986 is 68958978.

It is a happy number.

It is a Curzon number.

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, 666495 + ... + 666626.

It is an arithmetic number, because the mean of its divisors is an integer number (11998098).

Almost surely, 2^87985986 is an apocalyptic number.

87985986 is an abundant number, since it is smaller than the sum of its proper divisors (103983582).

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

87985986 is a wasteful number, since it uses less digits than its factorization.

87985986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333137.

The product of its digits is 8709120, while the sum is 60.

The square root of 87985986 is about 9380.0845411968. The cubic root of 87985986 is about 444.7724056051.

The spelling of 87985986 in words is "eighty-seven million, nine hundred eighty-five thousand, nine hundred eighty-six".