71493680 has 20 divisors (see below), whose sum is σ = 166222992. Its totient is φ = 28597440.

The previous prime is 71493673. The next prime is 71493701. The reversal of 71493680 is 8639417.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×71493680² = 10222692559884800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 446756 + ... + 446915.

Almost surely, 2^71493680 is an apocalyptic number.

It is an amenable number.

71493680 is an abundant number, since it is smaller than the sum of its proper divisors (94729312).

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

71493680 is a wasteful number, since it uses less digits than its factorization.

71493680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893684 (or 893678 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 71493680 is about 8455.3935449511. The cubic root of 71493680 is about 415.0392956452.

The spelling of 71493680 in words is "seventy-one million, four hundred ninety-three thousand, six hundred eighty".