87899128 has 8 divisors (see below), whose sum is σ = 164810880. Its totient is φ = 43949560.

The previous prime is 87899101. The next prime is 87899137. The reversal of 87899128 is 82199878.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5493688 + ... + 5493703.

It is an arithmetic number, because the mean of its divisors is an integer number (20601360).

Almost surely, 2^87899128 is an apocalyptic number.

It is an amenable number.

87899128 is a deficient number, since it is larger than the sum of its proper divisors (76911752).

87899128 is a wasteful number, since it uses less digits than its factorization.

87899128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10987397 (or 10987393 counting only the distinct ones).

The product of its digits is 580608, while the sum is 52.

The square root of 87899128 is about 9375.4534823655. The cubic root of 87899128 is about 444.6260006202.

The spelling of 87899128 in words is "eighty-seven million, eight hundred ninety-nine thousand, one hundred twenty-eight".