87278988 has 12 divisors (see below), whose sum is σ = 203651000. Its totient is φ = 29092992.

The previous prime is 87278987. The next prime is 87278993. The reversal of 87278988 is 88987278.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (87278987) by changing a digit.

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, 3636613 + ... + 3636636.

Almost surely, 2^87278988 is an apocalyptic number.

It is an amenable number.

87278988 is an abundant number, since it is smaller than the sum of its proper divisors (116372012).

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

87278988 is a wasteful number, since it uses less digits than its factorization.

87278988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7273256 (or 7273254 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 57.

The square root of 87278988 is about 9342.3224093370. The cubic root of 87278988 is about 443.5779001214.

The spelling of 87278988 in words is "eighty-seven million, two hundred seventy-eight thousand, nine hundred eighty-eight".