82040025 has 24 divisors (see below), whose sum is σ = 138205440. Its totient is φ = 42927040.

The previous prime is 82040017. The next prime is 82040029. The reversal of 82040025 is 52004028.

It is not a de Polignac number, because 82040025 - 2³ = 82040017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 82039983 and 82040010.

It is not an unprimeable number, because it can be changed into a prime (82040029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6345 + ... + 14294.

It is an arithmetic number, because the mean of its divisors is an integer number (5758560).

Almost surely, 2^82040025 is an apocalyptic number.

It is an amenable number.

82040025 is a deficient number, since it is larger than the sum of its proper divisors (56165415).

82040025 is a wasteful number, since it uses less digits than its factorization.

82040025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20705 (or 20700 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 82040025 is about 9057.5948794368. The cubic root of 82040025 is about 434.5188232057.

The spelling of 82040025 in words is "eighty-two million, forty thousand, twenty-five".