71889618 has 8 divisors (see below), whose sum is σ = 143779248. Its totient is φ = 23963204.

The previous prime is 71889613. The next prime is 71889619. The reversal of 71889618 is 81698817.

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

71889618 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (71889613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5990796 + ... + 5990807.

It is an arithmetic number, because the mean of its divisors is an integer number (17972406).

Almost surely, 2^71889618 is an apocalyptic number.

71889618 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

71889618 is a wasteful number, since it uses less digits than its factorization.

71889618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11981608.

The product of its digits is 193536, while the sum is 48.

The square root of 71889618 is about 8478.7745576823. The cubic root of 71889618 is about 415.8040597525.

The spelling of 71889618 in words is "seventy-one million, eight hundred eighty-nine thousand, six hundred eighteen".