71806912 has 56 divisors (see below), whose sum is σ = 155813760. Its totient is φ = 32686080.

The previous prime is 71806901. The next prime is 71806919. The reversal of 71806912 is 21960817.

It is a happy number.

It is a super-2 number, since 2×71806912² = 10312465221951488, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71806919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32664 + ... + 34792.

Almost surely, 2^71806912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71806912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77906880).

71806912 is an abundant number, since it is smaller than the sum of its proper divisors (84006848).

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

71806912 is a wasteful number, since it uses less digits than its factorization.

71806912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2189 (or 2179 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 71806912 is about 8473.8959162831. The cubic root of 71806912 is about 415.6445435022.

The spelling of 71806912 in words is "seventy-one million, eight hundred six thousand, nine hundred twelve".