71438454 has 48 divisors (see below), whose sum is σ = 165043008. Its totient is φ = 22254336.

The previous prime is 71438429. The next prime is 71438531. The reversal of 71438454 is 45483417.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47299 + ... + 48785.

It is an arithmetic number, because the mean of its divisors is an integer number (3438396).

Almost surely, 2^71438454 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71438454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82521504).

71438454 is an abundant number, since it is smaller than the sum of its proper divisors (93604554).

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

71438454 is a wasteful number, since it uses less digits than its factorization.

71438454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1669 (or 1666 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 71438454 is about 8452.1271878741. The cubic root of 71438454 is about 414.9324010473.

The spelling of 71438454 in words is "seventy-one million, four hundred thirty-eight thousand, four hundred fifty-four".