71311448 has 32 divisors (see below), whose sum is σ = 145059600. Its totient is φ = 32669568.

The previous prime is 71311421. The next prime is 71311453. The reversal of 71311448 is 84411317.

It is a self number, because there is not a number n which added to its sum of digits gives 71311448.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11990 + ... + 16922.

Almost surely, 2^71311448 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 71311448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72529800).

71311448 is an abundant number, since it is smaller than the sum of its proper divisors (73748152).

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

71311448 is a wasteful number, since it uses less digits than its factorization.

71311448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5091 (or 5087 counting only the distinct ones).

The product of its digits is 2688, while the sum is 29.

The square root of 71311448 is about 8444.6105890088. The cubic root of 71311448 is about 414.6863609830.

The spelling of 71311448 in words is "seventy-one million, three hundred eleven thousand, four hundred forty-eight".