71670258 has 80 divisors (see below), whose sum is σ = 180094464. Its totient is φ = 21111840.

The previous prime is 71670227. The next prime is 71670259. The reversal of 71670258 is 85207617.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71670259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 65391 + ... + 66477.

Almost surely, 2^71670258 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71670258, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90047232).

71670258 is an abundant number, since it is smaller than the sum of its proper divisors (108424206).

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

71670258 is a wasteful number, since it uses less digits than its factorization.

71670258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1149 (or 1140 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 71670258 is about 8465.8288430608. The cubic root of 71670258 is about 415.3807083678.

The spelling of 71670258 in words is "seventy-one million, six hundred seventy thousand, two hundred fifty-eight".