82182240 has 288 divisors, whose sum is σ = 332107776. Its totient is φ = 18109440.

The previous prime is 82182223. The next prime is 82182251. The reversal of 82182240 is 4228128.

It is a tau number, because it is divible by the number of its divisors (288).

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, 312349 + ... + 312611.

It is an arithmetic number, because the mean of its divisors is an integer number (1153152).

Almost surely, 2^82182240 is an apocalyptic number.

82182240 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 82182240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166053888).

82182240 is an abundant number, since it is smaller than the sum of its proper divisors (249925536).

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

82182240 is a wasteful number, since it uses less digits than its factorization.

82182240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 82182240 is about 9065.4420741627. The cubic root of 82182240 is about 434.7697552838.

The spelling of 82182240 in words is "eighty-two million, one hundred eighty-two thousand, two hundred forty".