71063890 has 8 divisors (see below), whose sum is σ = 127915020. Its totient is φ = 28425552.

The previous prime is 71063887. The next prime is 71063899. The reversal of 71063890 is 9836017.

It can be written as a sum of positive squares in 2 ways, for example, as 65270241 + 5793649 = 8079^2 + 2407^2 .

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

It is not an unprimeable number, because it can be changed into a prime (71063899) 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, 3553185 + ... + 3553204.

Almost surely, 2^71063890 is an apocalyptic number.

71063890 is a deficient number, since it is larger than the sum of its proper divisors (56851130).

71063890 is a wasteful number, since it uses less digits than its factorization.

71063890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7106396.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 71063890 is about 8429.9400946863. The cubic root of 71063890 is about 414.2059427972.

The spelling of 71063890 in words is "seventy-one million, sixty-three thousand, eight hundred ninety".