71207538 has 16 divisors (see below), whose sum is σ = 145445760. Its totient is φ = 23230736.

The previous prime is 71207501. The next prime is 71207551. The reversal of 71207538 is 83570217.

It is a junction number, because it is equal to n+sod(n) for n = 71207499 and 71207508.

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 7 ways as a sum of consecutive naturals, for example, 125973 + ... + 126536.

It is an arithmetic number, because the mean of its divisors is an integer number (9090360).

Almost surely, 2^71207538 is an apocalyptic number.

71207538 is an abundant number, since it is smaller than the sum of its proper divisors (74238222).

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

71207538 is a wasteful number, since it uses less digits than its factorization.

71207538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252561.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 71207538 is about 8438.4559014076. The cubic root of 71207538 is about 414.4848458584.

The spelling of 71207538 in words is "seventy-one million, two hundred seven thousand, five hundred thirty-eight".