71853438 has 32 divisors (see below), whose sum is σ = 146188800. Its totient is φ = 23541056.

The previous prime is 71853367. The next prime is 71853461. The reversal of 71853438 is 83435817.

Its product of digits (80640) is a multiple of the sum of its prime divisors (896).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 71853396 and 71853405.

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 15 ways as a sum of consecutive naturals, for example, 127345 + ... + 127907.

It is an arithmetic number, because the mean of its divisors is an integer number (4568400).

Almost surely, 2^71853438 is an apocalyptic number.

71853438 is an abundant number, since it is smaller than the sum of its proper divisors (74335362).

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

71853438 is a wasteful number, since it uses less digits than its factorization.

71853438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896.

The product of its digits is 80640, while the sum is 39.

The square root of 71853438 is about 8476.6407261367. The cubic root of 71853438 is about 415.7342939286.

The spelling of 71853438 in words is "seventy-one million, eight hundred fifty-three thousand, four hundred thirty-eight".