71953785 has 32 divisors (see below), whose sum is σ = 132336000. Its totient is φ = 37050048.

The previous prime is 71953781. The next prime is 71953793. The reversal of 71953785 is 58735917.

It is not a de Polignac number, because 71953785 - 2² = 71953781 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 71953785.

It is not an unprimeable number, because it can be changed into a prime (71953781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5275 + ... + 13104.

It is an arithmetic number, because the mean of its divisors is an integer number (4135500).

Almost surely, 2^71953785 is an apocalyptic number.

It is an amenable number.

71953785 is a deficient number, since it is larger than the sum of its proper divisors (60382215).

71953785 is a wasteful number, since it uses less digits than its factorization.

71953785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18422 (or 18416 counting only the distinct ones).

The product of its digits is 264600, while the sum is 45.

The square root of 71953785 is about 8482.5576921115. The cubic root of 71953785 is about 415.9277353055.

The spelling of 71953785 in words is "seventy-one million, nine hundred fifty-three thousand, seven hundred eighty-five".