82168380 has 72 divisors (see below), whose sum is σ = 284854752. Its totient is φ = 18781056.

The previous prime is 82168367. The next prime is 82168393. The reversal of 82168380 is 8386128.

It is an interprime number because it is at equal distance from previous prime (82168367) and next prime (82168393).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31347 + ... + 33866.

It is an arithmetic number, because the mean of its divisors is an integer number (3956316).

Almost surely, 2^82168380 is an apocalyptic number.

It is an amenable number.

82168380 is an abundant number, since it is smaller than the sum of its proper divisors (202686372).

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

82168380 is a wasteful number, since it uses less digits than its factorization.

82168380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65235 (or 65230 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 82168380 is about 9064.6776004445. The cubic root of 82168380 is about 434.7453126646.

The spelling of 82168380 in words is "eighty-two million, one hundred sixty-eight thousand, three hundred eighty".