71998680 has 64 divisors (see below), whose sum is σ = 232616160. Its totient is φ = 17722368.

The previous prime is 71998651. The next prime is 71998681. The reversal of 71998680 is 8689917.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71998681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21517 + ... + 24636.

Almost surely, 2^71998680 is an apocalyptic number.

It is an amenable number.

71998680 is an abundant number, since it is smaller than the sum of its proper divisors (160617480).

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

71998680 is a wasteful number, since it uses less digits than its factorization.

71998680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46180 (or 46176 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 48.

The square root of 71998680 is about 8485.2035921361. The cubic root of 71998680 is about 416.0142222702.

It can be divided in two parts, 719 and 98680, that added together give a palindrome (99399).

The spelling of 71998680 in words is "seventy-one million, nine hundred ninety-eight thousand, six hundred eighty".