71219904 has 112 divisors (see below), whose sum is σ = 226771200. Its totient is φ = 19270656.

The previous prime is 71219881. The next prime is 71219921. The reversal of 71219904 is 40991217.

It is a tau number, because it is divible by the number of its divisors (112).

It is an unprimeable number.

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, 24142 + ... + 26930.

Almost surely, 2^71219904 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 71219904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113385600).

71219904 is an abundant number, since it is smaller than the sum of its proper divisors (155551296).

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

71219904 is a wasteful number, since it uses less digits than its factorization.

71219904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2830 (or 2820 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 71219904 is about 8439.1885865882. The cubic root of 71219904 is about 414.5088378077.

The spelling of 71219904 in words is "seventy-one million, two hundred nineteen thousand, nine hundred four".