87717028 has 12 divisors (see below), whose sum is σ = 175434112. Its totient is φ = 37593000.

The previous prime is 87717017. The next prime is 87717043. The reversal of 87717028 is 82071778.

It is a happy number.

87717028 is an admirable number.

It is a super-3 number, since 3×87717028³ (a number of 25 digits) contains 333 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 in 3 ways as a sum of consecutive naturals, for example, 1566348 + ... + 1566403.

Almost surely, 2^87717028 is an apocalyptic number.

It is an amenable number.

87717028 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

87717028 is a wasteful number, since it uses less digits than its factorization.

87717028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3132762 (or 3132760 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 40.

The square root of 87717028 is about 9365.7369170824. The cubic root of 87717028 is about 444.3187454991.

The spelling of 87717028 in words is "eighty-seven million, seven hundred seventeen thousand, twenty-eight".