82138808 has 8 divisors (see below), whose sum is σ = 154010280. Its totient is φ = 41069400.

The previous prime is 82138807. The next prime is 82138811. The reversal of 82138808 is 80883128.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82138807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5133668 + ... + 5133683.

It is an arithmetic number, because the mean of its divisors is an integer number (19251285).

Almost surely, 2^82138808 is an apocalyptic number.

It is an amenable number.

82138808 is a deficient number, since it is larger than the sum of its proper divisors (71871472).

82138808 is a wasteful number, since it uses less digits than its factorization.

82138808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10267357 (or 10267353 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 38.

The square root of 82138808 is about 9063.0462869832. The cubic root of 82138808 is about 434.6931521660.

The spelling of 82138808 in words is "eighty-two million, one hundred thirty-eight thousand, eight hundred eight".