71197240 has 16 divisors (see below), whose sum is σ = 160193880. Its totient is φ = 28478880.

The previous prime is 71197229. The next prime is 71197267. The reversal of 71197240 is 4279117.

It is a congruent number.

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, 889926 + ... + 890005.

Almost surely, 2^71197240 is an apocalyptic number.

It is an amenable number.

71197240 is an abundant number, since it is smaller than the sum of its proper divisors (88996640).

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

71197240 is a wasteful number, since it uses less digits than its factorization.

71197240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1779942 (or 1779938 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 71197240 is about 8437.8456966219. The cubic root of 71197240 is about 414.4648640286.

The spelling of 71197240 in words is "seventy-one million, one hundred ninety-seven thousand, two hundred forty".