82720016 has 10 divisors (see below), whose sum is σ = 160270062. Its totient is φ = 41360000.

The previous prime is 82720013. The next prime is 82720019. The reversal of 82720016 is 61002728.

It is an interprime number because it is at equal distance from previous prime (82720013) and next prime (82720019).

It can be written as a sum of positive squares in only one way, i.e., 57760000 + 24960016 = 7600^2 + 4996^2 .

It is not an unprimeable number, because it can be changed into a prime (82720013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2584985 + ... + 2585016.

Almost surely, 2^82720016 is an apocalyptic number.

It is an amenable number.

82720016 is a deficient number, since it is larger than the sum of its proper divisors (77550046).

82720016 is a wasteful number, since it uses less digits than its factorization.

82720016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5170009 (or 5170003 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 82720016 is about 9095.0544803206. The cubic root of 82720016 is about 435.7160286489.

The spelling of 82720016 in words is "eighty-two million, seven hundred twenty thousand, sixteen".