82721346 has 8 divisors (see below), whose sum is σ = 165442704. Its totient is φ = 27573780.

The previous prime is 82721339. The next prime is 82721347. The reversal of 82721346 is 64312728.

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

82721346 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (82721347) 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 3 ways as a sum of consecutive naturals, for example, 6893440 + ... + 6893451.

It is an arithmetic number, because the mean of its divisors is an integer number (20680338).

Almost surely, 2^82721346 is an apocalyptic number.

82721346 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

82721346 is a wasteful number, since it uses less digits than its factorization.

82721346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13786896.

The product of its digits is 16128, while the sum is 33.

The square root of 82721346 is about 9095.1275966860. The cubic root of 82721346 is about 435.7183638323.

The spelling of 82721346 in words is "eighty-two million, seven hundred twenty-one thousand, three hundred forty-six".