71681286 has 8 divisors (see below), whose sum is σ = 143362584. Its totient is φ = 23893760.

The previous prime is 71681273. The next prime is 71681293. The reversal of 71681286 is 68218617.

It is a sphenic number, since it is the product of 3 distinct primes.

71681286 is an admirable number.

It is a super-2 number, since 2×71681286² = 10276413525227592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5973435 + ... + 5973446.

It is an arithmetic number, because the mean of its divisors is an integer number (17920323).

Almost surely, 2^71681286 is an apocalyptic number.

71681286 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

71681286 is a wasteful number, since it uses less digits than its factorization.

71681286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11946886.

The product of its digits is 32256, while the sum is 39.

The square root of 71681286 is about 8466.4801423023. The cubic root of 71681286 is about 415.4020123399.

The spelling of 71681286 in words is "seventy-one million, six hundred eighty-one thousand, two hundred eighty-six".