82115280 has 240 divisors, whose sum is σ = 307646976. Its totient is φ = 19491840.

The previous prime is 82115261. The next prime is 82115309. The reversal of 82115280 is 8251128.

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 290019 + ... + 290301.

Almost surely, 2^82115280 is an apocalyptic number.

82115280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82115280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153823488).

82115280 is an abundant number, since it is smaller than the sum of its proper divisors (225531696).

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

82115280 is a wasteful number, since it uses less digits than its factorization.

82115280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 82115280 is about 9061.7481757109. The cubic root of 82115280 is about 434.6516434184.

The spelling of 82115280 in words is "eighty-two million, one hundred fifteen thousand, two hundred eighty".