82420380 has 72 divisors (see below), whose sum is σ = 285728352. Its totient is φ = 18838656.

The previous prime is 82420357. The next prime is 82420381. The reversal of 82420380 is 8302428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82420381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31447 + ... + 33966.

Almost surely, 2^82420380 is an apocalyptic number.

It is an amenable number.

82420380 is an abundant number, since it is smaller than the sum of its proper divisors (203307972).

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

82420380 is a wasteful number, since it uses less digits than its factorization.

82420380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65435 (or 65430 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 82420380 is about 9078.5670675498. The cubic root of 82420380 is about 435.1892953389.

The spelling of 82420380 in words is "eighty-two million, four hundred twenty thousand, three hundred eighty".