71255448 has 72 divisors (see below), whose sum is σ = 212148300. Its totient is φ = 21589920.

The previous prime is 71255369. The next prime is 71255467. The reversal of 71255448 is 84455217.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4623 + ... + 12801.

Almost surely, 2^71255448 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 71255448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106074150).

71255448 is an abundant number, since it is smaller than the sum of its proper divisors (140892852).

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

71255448 is a wasteful number, since it uses less digits than its factorization.

71255448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8213 (or 8195 counting only the distinct ones).

The product of its digits is 44800, while the sum is 36.

The square root of 71255448 is about 8441.2942135670. The cubic root of 71255448 is about 414.5777831960.

The spelling of 71255448 in words is "seventy-one million, two hundred fifty-five thousand, four hundred forty-eight".