71606988 has 36 divisors (see below), whose sum is σ = 185902080. Its totient is φ = 23223456.

The previous prime is 71606957. The next prime is 71606989. The reversal of 71606988 is 88960617.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (71606989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25548 + ... + 28211.

Almost surely, 2^71606988 is an apocalyptic number.

It is an amenable number.

71606988 is an abundant number, since it is smaller than the sum of its proper divisors (114295092).

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

71606988 is a wasteful number, since it uses less digits than its factorization.

71606988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53806 (or 53801 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 71606988 is about 8462.0912308956. The cubic root of 71606988 is about 415.2584406585.

The spelling of 71606988 in words is "seventy-one million, six hundred six thousand, nine hundred eighty-eight".