84987018 has 24 divisors (see below), whose sum is σ = 184380768. Its totient is φ = 28291752.

The previous prime is 84987017. The next prime is 84987041. The reversal of 84987018 is 81078948.

It is not an unprimeable number, because it can be changed into a prime (84987011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13305 + ... + 18627.

It is an arithmetic number, because the mean of its divisors is an integer number (7682532).

Almost surely, 2^84987018 is an apocalyptic number.

84987018 is an abundant number, since it is smaller than the sum of its proper divisors (99393750).

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

84987018 is a wasteful number, since it uses less digits than its factorization.

84987018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6218 (or 6215 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 84987018 is about 9218.8403826078. The cubic root of 84987018 is about 439.6605819025.

The spelling of 84987018 in words is "eighty-four million, nine hundred eighty-seven thousand, eighteen".