71612004 has 12 divisors (see below), whose sum is σ = 167094704. Its totient is φ = 23870664.

The previous prime is 71611961. The next prime is 71612011. The reversal of 71612004 is 40021617.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2983822 + ... + 2983845.

Almost surely, 2^71612004 is an apocalyptic number.

It is an amenable number.

71612004 is an abundant number, since it is smaller than the sum of its proper divisors (95482700).

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

71612004 is a wasteful number, since it uses less digits than its factorization.

71612004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5967674 (or 5967672 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 71612004 is about 8462.3876063437. The cubic root of 71612004 is about 415.2681365823.

It can be divided in two parts, 716 and 12004, that added together give a triangular number (12720 = T₁₅₉).

The spelling of 71612004 in words is "seventy-one million, six hundred twelve thousand, four".