72820316 has 24 divisors (see below), whose sum is σ = 135263520. Its totient is φ = 34184192.

The previous prime is 72820313. The next prime is 72820327. The reversal of 72820316 is 61302827.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72820313) 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, 33140 + ... + 35268.

It is an arithmetic number, because the mean of its divisors is an integer number (5635980).

Almost surely, 2^72820316 is an apocalyptic number.

It is an amenable number.

72820316 is a deficient number, since it is larger than the sum of its proper divisors (62443204).

72820316 is a wasteful number, since it uses less digits than its factorization.

72820316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2653 (or 2651 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 72820316 is about 8533.4820559957. The cubic root of 72820316 is about 417.5907336234.

The spelling of 72820316 in words is "seventy-two million, eight hundred twenty thousand, three hundred sixteen".