71404885 has 8 divisors (see below), whose sum is σ = 86182200. Its totient is φ = 56793024.

The previous prime is 71404871. The next prime is 71404889. The reversal of 71404885 is 58840417.

It can be written as a sum of positive squares in 4 ways, for example, as 34023889 + 37380996 = 5833^2 + 6114^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71404885 - 2⁹ = 71404373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71404889) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 40410 + ... + 42139.

It is an arithmetic number, because the mean of its divisors is an integer number (10772775).

Almost surely, 2^71404885 is an apocalyptic number.

It is an amenable number.

71404885 is a deficient number, since it is larger than the sum of its proper divisors (14777315).

71404885 is a wasteful number, since it uses less digits than its factorization.

71404885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82727.

The product of its (nonzero) digits is 35840, while the sum is 37.

The square root of 71404885 is about 8450.1411230819. The cubic root of 71404885 is about 414.8673984832.

The spelling of 71404885 in words is "seventy-one million, four hundred four thousand, eight hundred eighty-five".