71191456 has 48 divisors (see below), whose sum is σ = 162025920. Its totient is φ = 30159360.

The previous prime is 71191451. The next prime is 71191481. The reversal of 71191456 is 65419117.

It is not an unprimeable number, because it can be changed into a prime (71191451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18151 + ... + 21721.

It is an arithmetic number, because the mean of its divisors is an integer number (3375540).

Almost surely, 2^71191456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71191456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81012960).

71191456 is an abundant number, since it is smaller than the sum of its proper divisors (90834464).

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

71191456 is a wasteful number, since it uses less digits than its factorization.

71191456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3677 (or 3669 counting only the distinct ones).

The product of its digits is 7560, while the sum is 34.

The square root of 71191456 is about 8437.5029481476. The cubic root of 71191456 is about 414.4536401399.

The spelling of 71191456 in words is "seventy-one million, one hundred ninety-one thousand, four hundred fifty-six".