87806128 has 10 divisors (see below), whose sum is σ = 170124404. Its totient is φ = 43903056.

The previous prime is 87806119. The next prime is 87806137. The reversal of 87806128 is 82160878.

It is an interprime number because it is at equal distance from previous prime (87806119) and next prime (87806137).

It is a super-2 number, since 2×87806128² = 15419832228704768, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2743926 + ... + 2743957.

Almost surely, 2^87806128 is an apocalyptic number.

It is an amenable number.

87806128 is a deficient number, since it is larger than the sum of its proper divisors (82318276).

87806128 is a wasteful number, since it uses less digits than its factorization.

87806128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5487891 (or 5487885 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 87806128 is about 9370.4924096869. The cubic root of 87806128 is about 444.4691359245.

The spelling of 87806128 in words is "eighty-seven million, eight hundred six thousand, one hundred twenty-eight".