71427618 has 12 divisors (see below), whose sum is σ = 154759878. Its totient is φ = 23809200.

The previous prime is 71427611. The next prime is 71427641. The reversal of 71427618 is 81672417.

71427618 is a `hidden beast` number, since 7 + 14 + 27 + 618 = 666.

It can be written as a sum of positive squares in only one way, i.e., 67519089 + 3908529 = 8217^2 + 1977^2 .

It is a super-2 number, since 2×71427618² = 10203809226307848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71427611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1984083 + ... + 1984118.

Almost surely, 2^71427618 is an apocalyptic number.

71427618 is an abundant number, since it is smaller than the sum of its proper divisors (83332260).

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

71427618 is a wasteful number, since it uses less digits than its factorization.

71427618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3968209 (or 3968206 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 71427618 is about 8451.4861415020. The cubic root of 71427618 is about 414.9114205875.

The spelling of 71427618 in words is "seventy-one million, four hundred twenty-seven thousand, six hundred eighteen".