82001280 has 64 divisors (see below), whose sum is σ = 261385200. Its totient is φ = 21866496.

The previous prime is 82001273. The next prime is 82001281. The reversal of 82001280 is 8210028.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82001281) 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, 19435 + ... + 23274.

Almost surely, 2^82001280 is an apocalyptic number.

82001280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

82001280 is an abundant number, since it is smaller than the sum of its proper divisors (179383920).

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

82001280 is a wasteful number, since it uses less digits than its factorization.

82001280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42731 (or 42719 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 82001280 is about 9055.4558140383. The cubic root of 82001280 is about 434.4504091083.

The spelling of 82001280 in words is "eighty-two million, one thousand, two hundred eighty".