82712340 has 192 divisors, whose sum is σ = 273315840. Its totient is φ = 20995200.

The previous prime is 82712317. The next prime is 82712341. The reversal of 82712340 is 4321728.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82712341) 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 63 ways as a sum of consecutive naturals, for example, 1355910 + ... + 1355970.

It is an arithmetic number, because the mean of its divisors is an integer number (1423520).

Almost surely, 2^82712340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82712340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136657920).

82712340 is an abundant number, since it is smaller than the sum of its proper divisors (190603500).

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

82712340 is a wasteful number, since it uses less digits than its factorization.

82712340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 82712340 is about 9094.6324829539. The cubic root of 82712340 is about 435.7025508159.

The spelling of 82712340 in words is "eighty-two million, seven hundred twelve thousand, three hundred forty".