71878616 has 8 divisors (see below), whose sum is σ = 134772420. Its totient is φ = 35939304.

The previous prime is 71878613. The next prime is 71878661. The reversal of 71878616 is 61687817.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71878613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4492406 + ... + 4492421.

Almost surely, 2^71878616 is an apocalyptic number.

It is an amenable number.

71878616 is a deficient number, since it is larger than the sum of its proper divisors (62893804).

71878616 is a wasteful number, since it uses less digits than its factorization.

71878616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8984833 (or 8984829 counting only the distinct ones).

The product of its digits is 112896, while the sum is 44.

The square root of 71878616 is about 8478.1257362698. The cubic root of 71878616 is about 415.7828470944.

The spelling of 71878616 in words is "seventy-one million, eight hundred seventy-eight thousand, six hundred sixteen".