71486988 has 12 divisors (see below), whose sum is σ = 166803000. Its totient is φ = 23828992.

The previous prime is 71486981. The next prime is 71486999. The reversal of 71486988 is 88968417.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×71486988² = 10220778906624288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71486988.

It is not an unprimeable number, because it can be changed into a prime (71486981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2978613 + ... + 2978636.

It is an arithmetic number, because the mean of its divisors is an integer number (13900250).

Almost surely, 2^71486988 is an apocalyptic number.

It is an amenable number.

71486988 is an abundant number, since it is smaller than the sum of its proper divisors (95316012).

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

71486988 is a wasteful number, since it uses less digits than its factorization.

71486988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5957256 (or 5957254 counting only the distinct ones).

The product of its digits is 774144, while the sum is 51.

The square root of 71486988 is about 8454.9978119453. The cubic root of 71486988 is about 415.0263456444.

The spelling of 71486988 in words is "seventy-one million, four hundred eighty-six thousand, nine hundred eighty-eight".