71398806 has 16 divisors (see below), whose sum is σ = 143539824. Its totient is φ = 23675904.

The previous prime is 71398801. The next prime is 71398823. The reversal of 71398806 is 60889317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71398801) 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, 29671 + ... + 31986.

It is an arithmetic number, because the mean of its divisors is an integer number (8971239).

Almost surely, 2^71398806 is an apocalyptic number.

71398806 is an abundant number, since it is smaller than the sum of its proper divisors (72141018).

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

71398806 is a wasteful number, since it uses less digits than its factorization.

71398806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61855.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 71398806 is about 8449.7814172912. The cubic root of 71398806 is about 414.8556250100.

The spelling of 71398806 in words is "seventy-one million, three hundred ninety-eight thousand, eight hundred six".