71031798 has 12 divisors (see below), whose sum is σ = 153902268. Its totient is φ = 23677260.

The previous prime is 71031791. The next prime is 71031799. The reversal of 71031798 is 89713017.

It is a super-2 number, since 2×71031798² = 10091032654225608, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71031791) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1973088 + ... + 1973123.

It is an arithmetic number, because the mean of its divisors is an integer number (12825189).

Almost surely, 2^71031798 is an apocalyptic number.

71031798 is an abundant number, since it is smaller than the sum of its proper divisors (82870470).

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

71031798 is a wasteful number, since it uses less digits than its factorization.

71031798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3946219 (or 3946216 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 71031798 is about 8428.0364261197. The cubic root of 71031798 is about 414.1435824874.

The spelling of 71031798 in words is "seventy-one million, thirty-one thousand, seven hundred ninety-eight".