82720814 has 8 divisors (see below), whose sum is σ = 135361368. Its totient is φ = 37600360.

The previous prime is 82720747. The next prime is 82720817. The reversal of 82720814 is 41802728.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82720817) 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, 1879997 + ... + 1880040.

It is an arithmetic number, because the mean of its divisors is an integer number (16920171).

Almost surely, 2^82720814 is an apocalyptic number.

82720814 is a deficient number, since it is larger than the sum of its proper divisors (52640554).

82720814 is a wasteful number, since it uses less digits than its factorization.

82720814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3760050.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 82720814 is about 9095.0983502104. The cubic root of 82720814 is about 435.7174297619.

The spelling of 82720814 in words is "eighty-two million, seven hundred twenty thousand, eight hundred fourteen".