71889851 has 24 divisors (see below), whose sum is σ = 83074992. Its totient is φ = 62092800.

The previous prime is 71889847. The next prime is 71889871. The reversal of 71889851 is 15898817.

It is not a de Polignac number, because 71889851 - 2² = 71889847 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71889796 and 71889805.

It is not an unprimeable number, because it can be changed into a prime (71889871) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 213155 + ... + 213491.

It is an arithmetic number, because the mean of its divisors is an integer number (3461458).

Almost surely, 2^71889851 is an apocalyptic number.

71889851 is a deficient number, since it is larger than the sum of its proper divisors (11185141).

71889851 is a wasteful number, since it uses less digits than its factorization.

71889851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443 (or 432 counting only the distinct ones).

The product of its digits is 161280, while the sum is 47.

The square root of 71889851 is about 8478.7882978643. The cubic root of 71889851 is about 415.8045089701.

The spelling of 71889851 in words is "seventy-one million, eight hundred eighty-nine thousand, eight hundred fifty-one".