71297838 has 24 divisors (see below), whose sum is σ = 161196048. Its totient is φ = 22732512.

The previous prime is 71297803. The next prime is 71297839. The reversal of 71297838 is 83879217.

It is a junction number, because it is equal to n+sod(n) for n = 71297793 and 71297802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71297839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85695 + ... + 86522.

It is an arithmetic number, because the mean of its divisors is an integer number (6716502).

Almost surely, 2^71297838 is an apocalyptic number.

71297838 is an abundant number, since it is smaller than the sum of its proper divisors (89898210).

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

71297838 is a wasteful number, since it uses less digits than its factorization.

71297838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172248 (or 172245 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 71297838 is about 8443.8047111477. The cubic root of 71297838 is about 414.6599779332.

The spelling of 71297838 in words is "seventy-one million, two hundred ninety-seven thousand, eight hundred thirty-eight".