82081402 has 8 divisors (see below), whose sum is σ = 132593076. Its totient is φ = 37883712.

The previous prime is 82081399. The next prime is 82081403. The reversal of 82081402 is 20418028.

It can be written as a sum of positive squares in 2 ways, for example, as 81920601 + 160801 = 9051^2 + 401^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (82081403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1578463 + ... + 1578514.

Almost surely, 2^82081402 is an apocalyptic number.

82081402 is a deficient number, since it is larger than the sum of its proper divisors (50511674).

82081402 is a wasteful number, since it uses less digits than its factorization.

82081402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3156992.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 82081402 is about 9059.8786967597. The cubic root of 82081402 is about 434.5918609846.

The spelling of 82081402 in words is "eighty-two million, eighty-one thousand, four hundred two".