71204144 has 30 divisors (see below), whose sum is σ = 151643940. Its totient is φ = 32364640.

The previous prime is 71204131. The next prime is 71204149. The reversal of 71204144 is 44140217.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (71204149) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16454 + ... + 20325.

It is an arithmetic number, because the mean of its divisors is an integer number (5054798).

Almost surely, 2^71204144 is an apocalyptic number.

It is an amenable number.

71204144 is an abundant number, since it is smaller than the sum of its proper divisors (80439796).

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

71204144 is a wasteful number, since it uses less digits than its factorization.

71204144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36809 (or 36792 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 71204144 is about 8438.2547958686. The cubic root of 71204144 is about 414.4782604886.

The spelling of 71204144 in words is "seventy-one million, two hundred four thousand, one hundred forty-four".