71409984 has 28 divisors (see below), whose sum is σ = 188939424. Its totient is φ = 23803264.

The previous prime is 71409973. The next prime is 71409991. The reversal of 71409984 is 48990417.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185772 + ... + 186155.

Almost surely, 2^71409984 is an apocalyptic number.

It is an amenable number.

71409984 is an abundant number, since it is smaller than the sum of its proper divisors (117529440).

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

71409984 is a wasteful number, since it uses less digits than its factorization.

71409984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371942 (or 371932 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 71409984 is about 8450.4428286333. The cubic root of 71409984 is about 414.8772734309.

The spelling of 71409984 in words is "seventy-one million, four hundred nine thousand, nine hundred eighty-four".