82566438 has 16 divisors (see below), whose sum is σ = 173824320. Its totient is φ = 26073576.

The previous prime is 82566437. The next prime is 82566487. The reversal of 82566438 is 83466528.

It is a self number, because there is not a number n which added to its sum of digits gives 82566438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82566437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 362020 + ... + 362247.

It is an arithmetic number, because the mean of its divisors is an integer number (10864020).

Almost surely, 2^82566438 is an apocalyptic number.

82566438 is an abundant number, since it is smaller than the sum of its proper divisors (91257882).

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

82566438 is a wasteful number, since it uses less digits than its factorization.

82566438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724291.

The product of its digits is 276480, while the sum is 42.

The square root of 82566438 is about 9086.6076178076. The cubic root of 82566438 is about 435.4462114407.

The spelling of 82566438 in words is "eighty-two million, five hundred sixty-six thousand, four hundred thirty-eight".