71238870 has 24 divisors (see below), whose sum is σ = 185221296. Its totient is φ = 18997008.

The previous prime is 71238863. The next prime is 71238941. The reversal of 71238870 is 7883217.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 395682 + ... + 395861.

It is an arithmetic number, because the mean of its divisors is an integer number (7717554).

Almost surely, 2^71238870 is an apocalyptic number.

71238870 is an abundant number, since it is smaller than the sum of its proper divisors (113982426).

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

71238870 is a wasteful number, since it uses less digits than its factorization.

71238870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791556 (or 791553 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 71238870 is about 8440.3121980173. The cubic root of 71238870 is about 414.5456293806.

The spelling of 71238870 in words is "seventy-one million, two hundred thirty-eight thousand, eight hundred seventy".