71438 has 8 divisors (see below), whose sum is σ = 111888. Its totient is φ = 34144.

The previous prime is 71437. The next prime is 71443. The reversal of 71438 is 83417.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 731 + ... + 822.

It is an arithmetic number, because the mean of its divisors is an integer number (13986).

2⁷¹⁴³⁸ is an apocalyptic number.

71438 is a deficient number, since it is larger than the sum of its proper divisors (40450).

71438 is a wasteful number, since it uses less digits than its factorization.

71438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1578.

The product of its digits is 672, while the sum is 23.

The square root of 71438 is about 267.2788805723. The cubic root of 71438 is about 41.4931522064.

The spelling of 71438 in words is "seventy-one thousand, four hundred thirty-eight".