87909028 has 24 divisors (see below), whose sum is σ = 158846688. Its totient is φ = 42542976.

The previous prime is 87909011. The next prime is 87909061. The reversal of 87909028 is 82090978.

It is a Harshad number since it is a multiple of its sum of digits (43).

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 7 ways as a sum of consecutive naturals, for example, 17175 + ... + 21697.

It is an arithmetic number, because the mean of its divisors is an integer number (6618612).

Almost surely, 2^87909028 is an apocalyptic number.

It is an amenable number.

87909028 is a deficient number, since it is larger than the sum of its proper divisors (70937660).

87909028 is a wasteful number, since it uses less digits than its factorization.

87909028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4683 (or 4681 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 87909028 is about 9375.9814419612. The cubic root of 87909028 is about 444.6426926029.

The spelling of 87909028 in words is "eighty-seven million, nine hundred nine thousand, twenty-eight".