71005090 has 96 divisors (see below), whose sum is σ = 155539440. Its totient is φ = 23113728.

The previous prime is 71005063. The next prime is 71005133. The reversal of 71005090 is 9050017.

It can be written as a sum of positive squares in 8 ways, for example, as 16378209 + 54626881 = 4047^2 + 7391^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 797766 + ... + 797854.

Almost surely, 2^71005090 is an apocalyptic number.

71005090 is an abundant number, since it is smaller than the sum of its proper divisors (84534350).

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

71005090 is a wasteful number, since it uses less digits than its factorization.

71005090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 315, while the sum is 22.

The square root of 71005090 is about 8426.4518036953. The cubic root of 71005090 is about 414.0916698994.

The spelling of 71005090 in words is "seventy-one million, five thousand, ninety".