71951864 has 16 divisors (see below), whose sum is σ = 135003120. Its totient is φ = 35951040.

The previous prime is 71951863. The next prime is 71951909. The reversal of 71951864 is 46815917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71951863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16277 + ... + 20219.

It is an arithmetic number, because the mean of its divisors is an integer number (8437695).

Almost surely, 2^71951864 is an apocalyptic number.

It is an amenable number.

71951864 is a deficient number, since it is larger than the sum of its proper divisors (63051256).

71951864 is a wasteful number, since it uses less digits than its factorization.

71951864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6230 (or 6226 counting only the distinct ones).

The product of its digits is 60480, while the sum is 41.

The square root of 71951864 is about 8482.4444589988. Note that the first 4 decimals coincide. The cubic root of 71951864 is about 415.9240338357.

The spelling of 71951864 in words is "seventy-one million, nine hundred fifty-one thousand, eight hundred sixty-four".