82381408 has 24 divisors (see below), whose sum is σ = 163364040. Its totient is φ = 40892160.

The previous prime is 82381399. The next prime is 82381417. The reversal of 82381408 is 80418328.

It is an interprime number because it is at equal distance from previous prime (82381399) and next prime (82381417).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4813 + ... + 13708.

It is an arithmetic number, because the mean of its divisors is an integer number (6806835).

Almost surely, 2^82381408 is an apocalyptic number.

It is an amenable number.

82381408 is a deficient number, since it is larger than the sum of its proper divisors (80982632).

82381408 is a wasteful number, since it uses less digits than its factorization.

82381408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18670 (or 18662 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 82381408 is about 9076.4204397989. The cubic root of 82381408 is about 435.1206922778.

The spelling of 82381408 in words is "eighty-two million, three hundred eighty-one thousand, four hundred eight".