87639116 has 12 divisors (see below), whose sum is σ = 154226520. Its totient is φ = 43574400.

The previous prime is 87639113. The next prime is 87639121. The reversal of 87639116 is 61193678.

It is a super-2 number, since 2×87639116² = 15361229306522912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87639113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60485 + ... + 61916.

It is an arithmetic number, because the mean of its divisors is an integer number (12852210).

Almost surely, 2^87639116 is an apocalyptic number.

It is an amenable number.

87639116 is a deficient number, since it is larger than the sum of its proper divisors (66587404).

87639116 is a wasteful number, since it uses less digits than its factorization.

87639116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122584 (or 122582 counting only the distinct ones).

The product of its digits is 54432, while the sum is 41.

The square root of 87639116 is about 9361.5765766243. The cubic root of 87639116 is about 444.1871556306.

The spelling of 87639116 in words is "eighty-seven million, six hundred thirty-nine thousand, one hundred sixteen".