84643018 has 8 divisors (see below), whose sum is σ = 127698948. Its totient is φ = 42076704.

The previous prime is 84643007. The next prime is 84643057. The reversal of 84643018 is 81034648.

It can be written as a sum of positive squares in 2 ways, for example, as 84511249 + 131769 = 9193^2 + 363^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×84643018² = 14328880992296648, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121971 + ... + 122662.

Almost surely, 2^84643018 is an apocalyptic number.

84643018 is a deficient number, since it is larger than the sum of its proper divisors (43055930).

84643018 is a wasteful number, since it uses less digits than its factorization.

84643018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244808.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 84643018 is about 9200.1640202770. The cubic root of 84643018 is about 439.0665783903.

The spelling of 84643018 in words is "eighty-four million, six hundred forty-three thousand, eighteen".