71695988 has 48 divisors (see below), whose sum is σ = 155119104. Its totient is φ = 28235520.

The previous prime is 71695979. The next prime is 71696029. The reversal of 71695988 is 88959617.

It is a super-2 number, since 2×71695988² = 10280629390592288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156656 + ... + 157112.

It is an arithmetic number, because the mean of its divisors is an integer number (3231648).

Almost surely, 2^71695988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71695988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77559552).

71695988 is an abundant number, since it is smaller than the sum of its proper divisors (83423116).

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

71695988 is a wasteful number, since it uses less digits than its factorization.

71695988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912 (or 910 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 53.

The square root of 71695988 is about 8467.3483452613. The cubic root of 71695988 is about 415.4304103744.

The spelling of 71695988 in words is "seventy-one million, six hundred ninety-five thousand, nine hundred eighty-eight".