71440187 has 18 divisors (see below), whose sum is σ = 89998668. Its totient is φ = 56517552.

The previous prime is 71440183. The next prime is 71440189. The reversal of 71440187 is 78104417.

It is not a de Polignac number, because 71440187 - 2² = 71440183 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71440183) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3968 + ... + 12594.

It is an arithmetic number, because the mean of its divisors is an integer number (4999926).

Almost surely, 2^71440187 is an apocalyptic number.

71440187 is a deficient number, since it is larger than the sum of its proper divisors (18558481).

71440187 is a wasteful number, since it uses less digits than its factorization.

71440187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8667 (or 8647 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 71440187 is about 8452.2297058232. The cubic root of 71440187 is about 414.9357562526.

The spelling of 71440187 in words is "seventy-one million, four hundred forty thousand, one hundred eighty-seven".