71445018 has 16 divisors (see below), whose sum is σ = 147499776. Its totient is φ = 23046720.

The previous prime is 71444983. The next prime is 71445037. The reversal of 71445018 is 81054417.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191871 + ... + 192242.

It is an arithmetic number, because the mean of its divisors is an integer number (9218736).

Almost surely, 2^71445018 is an apocalyptic number.

71445018 is an abundant number, since it is smaller than the sum of its proper divisors (76054758).

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

71445018 is a wasteful number, since it uses less digits than its factorization.

71445018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384149.

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 71445018 is about 8452.5154835706. The cubic root of 71445018 is about 414.9451091091.

The spelling of 71445018 in words is "seventy-one million, four hundred forty-five thousand, eighteen".