71700018 has 16 divisors (see below), whose sum is σ = 154430976. Its totient is φ = 22061520.

The previous prime is 71700007. The next prime is 71700019. The reversal of 71700018 is 81000717.

It is not an unprimeable number, because it can be changed into a prime (71700019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 459538 + ... + 459693.

It is an arithmetic number, because the mean of its divisors is an integer number (9651936).

Almost surely, 2^71700018 is an apocalyptic number.

71700018 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

71700018 is an abundant number, since it is smaller than the sum of its proper divisors (82730958).

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

71700018 is a wasteful number, since it uses less digits than its factorization.

71700018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919249.

The product of its (nonzero) digits is 392, while the sum is 24.

The square root of 71700018 is about 8467.5863148834. The cubic root of 71700018 is about 415.4381939488.

The spelling of 71700018 in words is "seventy-one million, seven hundred thousand, eighteen".