82573438 has 4 divisors (see below), whose sum is σ = 123860160. Its totient is φ = 41286718.

The previous prime is 82573397. The next prime is 82573441. The reversal of 82573438 is 83437528.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 82573438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20643358 + ... + 20643361.

It is an arithmetic number, because the mean of its divisors is an integer number (30965040).

Almost surely, 2^82573438 is an apocalyptic number.

82573438 is a deficient number, since it is larger than the sum of its proper divisors (41286722).

82573438 is a wasteful number, since it uses less digits than its factorization.

82573438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41286721.

The product of its digits is 161280, while the sum is 40.

The square root of 82573438 is about 9086.9927918977. The cubic root of 82573438 is about 435.4585168334.

The spelling of 82573438 in words is "eighty-two million, five hundred seventy-three thousand, four hundred thirty-eight".