82721324 has 12 divisors (see below), whose sum is σ = 165442704. Its totient is φ = 35451984.

The previous prime is 82721321. The next prime is 82721339. The reversal of 82721324 is 42312728.

82721324 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (82721321) 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, 1477139 + ... + 1477194.

It is an arithmetic number, because the mean of its divisors is an integer number (13786892).

Almost surely, 2^82721324 is an apocalyptic number.

It is an amenable number.

82721324 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.

82721324 is a wasteful number, since it uses less digits than its factorization.

82721324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2954344 (or 2954342 counting only the distinct ones).

The product of its digits is 5376, while the sum is 29.

The square root of 82721324 is about 9095.1263872472. The cubic root of 82721324 is about 435.7183252054.

The spelling of 82721324 in words is "eighty-two million, seven hundred twenty-one thousand, three hundred twenty-four".