84087018 has 32 divisors (see below), whose sum is σ = 187387200. Its totient is φ = 27949968.

The previous prime is 84086999. The next prime is 84087019. The reversal of 84087018 is 81078048.

It is a super-2 number, since 2×84087018² = 14141253192264648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84087019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19005 + ... + 23007.

It is an arithmetic number, because the mean of its divisors is an integer number (5855850).

Almost surely, 2^84087018 is an apocalyptic number.

84087018 is an abundant number, since it is smaller than the sum of its proper divisors (103300182).

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

84087018 is a wasteful number, since it uses less digits than its factorization.

84087018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4403 (or 4397 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 84087018 is about 9169.8973821957. The cubic root of 84087018 is about 438.1030907649.

The spelling of 84087018 in words is "eighty-four million, eighty-seven thousand, eighteen".