71618004 has 36 divisors (see below), whose sum is σ = 181359360. Its totient is φ = 23829840.

The previous prime is 71617981. The next prime is 71618009. The reversal of 71618004 is 40081617.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71618009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23437 + ... + 26315.

It is an arithmetic number, because the mean of its divisors is an integer number (5037760).

Almost surely, 2^71618004 is an apocalyptic number.

It is an amenable number.

71618004 is an abundant number, since it is smaller than the sum of its proper divisors (109741356).

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

71618004 is a wasteful number, since it uses less digits than its factorization.

71618004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3580 (or 3575 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 71618004 is about 8462.7421087967. The cubic root of 71618004 is about 415.2797339827.

The spelling of 71618004 in words is "seventy-one million, six hundred eighteen thousand, four".