82730720 has 24 divisors (see below), whose sum is σ = 195451704. Its totient is φ = 33092224.

The previous prime is 82730719. The next prime is 82730749. The reversal of 82730720 is 2703728.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258374 + ... + 258693.

It is an arithmetic number, because the mean of its divisors is an integer number (8143821).

Almost surely, 2^82730720 is an apocalyptic number.

82730720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

82730720 is an abundant number, since it is smaller than the sum of its proper divisors (112720984).

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

82730720 is a wasteful number, since it uses less digits than its factorization.

82730720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517082 (or 517074 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 82730720 is about 9095.6429129556. The cubic root of 82730720 is about 435.7348217756.

The spelling of 82730720 in words is "eighty-two million, seven hundred thirty thousand, seven hundred twenty".