71808464 has 80 divisors (see below), whose sum is σ = 172905600. Its totient is φ = 28131840.

The previous prime is 71808463. The next prime is 71808469. The reversal of 71808464 is 46480817.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71808463) 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 15 ways as a sum of consecutive naturals, for example, 216779 + ... + 217109.

It is an arithmetic number, because the mean of its divisors is an integer number (2161320).

Almost surely, 2^71808464 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 71808464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86452800).

71808464 is an abundant number, since it is smaller than the sum of its proper divisors (101097136).

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

71808464 is a wasteful number, since it uses less digits than its factorization.

71808464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508 (or 502 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 71808464 is about 8473.9874911402. The cubic root of 71808464 is about 415.6475379943.

The spelling of 71808464 in words is "seventy-one million, eight hundred eight thousand, four hundred sixty-four".