87998142 has 16 divisors (see below), whose sum is σ = 178408080. Its totient is φ = 28930752.

The previous prime is 87998129. The next prime is 87998143. The reversal of 87998142 is 24189978.

It is a junction number, because it is equal to n+sod(n) for n = 87998091 and 87998100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87998143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100017 + ... + 100892.

It is an arithmetic number, because the mean of its divisors is an integer number (11150505).

Almost surely, 2^87998142 is an apocalyptic number.

87998142 is an abundant number, since it is smaller than the sum of its proper divisors (90409938).

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

87998142 is a wasteful number, since it uses less digits than its factorization.

87998142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200987.

The product of its digits is 290304, while the sum is 48.

The square root of 87998142 is about 9380.7324873914. The cubic root of 87998142 is about 444.7928876714.

The spelling of 87998142 in words is "eighty-seven million, nine hundred ninety-eight thousand, one hundred forty-two".