71018406 has 12 divisors (see below), whose sum is σ = 153873252. Its totient is φ = 23672796.

The previous prime is 71018399. The next prime is 71018407. The reversal of 71018406 is 60481017.

It is a happy number.

It is a super-2 number, since 2×71018406² = 10087227981561672, which contains 22 as substring.

It is a Curzon number.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 71018406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71018407) 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, 1972716 + ... + 1972751.

It is an arithmetic number, because the mean of its divisors is an integer number (12822771).

Almost surely, 2^71018406 is an apocalyptic number.

71018406 is an abundant number, since it is smaller than the sum of its proper divisors (82854846).

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

71018406 is a wasteful number, since it uses less digits than its factorization.

71018406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3945475 (or 3945472 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 71018406 is about 8427.2418975606. The cubic root of 71018406 is about 414.1175539594.

The spelling of 71018406 in words is "seventy-one million, eighteen thousand, four hundred six".