72820282 has 16 divisors (see below), whose sum is σ = 116304552. Its totient is φ = 34076160.

The previous prime is 72820259. The next prime is 72820283. The reversal of 72820282 is 28202827.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 65950641 + 6869641 = 8121^2 + 2621^2 .

It is not an unprimeable number, because it can be changed into a prime (72820283) 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 7 ways as a sum of consecutive naturals, for example, 238 + ... + 12070.

Almost surely, 2^72820282 is an apocalyptic number.

72820282 is a deficient number, since it is larger than the sum of its proper divisors (43484270).

72820282 is a wasteful number, since it uses less digits than its factorization.

72820282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12033.

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 72820282 is about 8533.4800638427. The cubic root of 72820282 is about 417.5906686320.

The spelling of 72820282 in words is "seventy-two million, eight hundred twenty thousand, two hundred eighty-two".