78084018 has 24 divisors (see below), whose sum is σ = 170040000. Its totient is φ = 25896024.

The previous prime is 78083989. The next prime is 78084029. The reversal of 78084018 is 81048087.

It is a super-2 number, since 2×78084018² = 12194227734048648, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7318 + ... + 14481.

It is an arithmetic number, because the mean of its divisors is an integer number (7085000).

Almost surely, 2^78084018 is an apocalyptic number.

78084018 is an abundant number, since it is smaller than the sum of its proper divisors (91955982).

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

78084018 is a wasteful number, since it uses less digits than its factorization.

78084018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22006 (or 22003 counting only the distinct ones).

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

The square root of 78084018 is about 8836.5161687172. The cubic root of 78084018 is about 427.4192234783.

The spelling of 78084018 in words is "seventy-eight million, eighty-four thousand, eighteen".