72811020 has 24 divisors (see below), whose sum is σ = 203871024. Its totient is φ = 19416256.

The previous prime is 72811007. The next prime is 72811027. The reversal of 72811020 is 2011827.

It is not an unprimeable number, because it can be changed into a prime (72811027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 606699 + ... + 606818.

It is an arithmetic number, because the mean of its divisors is an integer number (8494626).

Almost surely, 2^72811020 is an apocalyptic number.

It is an amenable number.

72811020 is an abundant number, since it is smaller than the sum of its proper divisors (131060004).

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

72811020 is a wasteful number, since it uses less digits than its factorization.

72811020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213529 (or 1213527 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 72811020 is about 8532.9373606045. The cubic root of 72811020 is about 417.5729634512.

Adding to 72811020 its reverse (2011827), we get a palindrome (74822847).

The spelling of 72811020 in words is "seventy-two million, eight hundred eleven thousand, twenty".