71638116 has 24 divisors (see below), whose sum is σ = 182351904. Its totient is φ = 21708480.

The previous prime is 71638103. The next prime is 71638121. The reversal of 71638116 is 61183617.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271225 + ... + 271488.

It is an arithmetic number, because the mean of its divisors is an integer number (7597996).

Almost surely, 2^71638116 is an apocalyptic number.

It is an amenable number.

71638116 is an abundant number, since it is smaller than the sum of its proper divisors (110713788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71638116 is a wasteful number, since it uses less digits than its factorization.

71638116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542731 (or 542729 counting only the distinct ones).

The product of its digits is 6048, while the sum is 33.

The square root of 71638116 is about 8463.9302927186. The cubic root of 71638116 is about 415.3186037447.

The spelling of 71638116 in words is "seventy-one million, six hundred thirty-eight thousand, one hundred sixteen".