72262220 has 24 divisors (see below), whose sum is σ = 152914608. Its totient is φ = 28683200.

The previous prime is 72262217. The next prime is 72262237. The reversal of 72262220 is 2226227.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11171 + ... + 16410.

It is an arithmetic number, because the mean of its divisors is an integer number (6371442).

Almost surely, 2^72262220 is an apocalyptic number.

It is an amenable number.

72262220 is an abundant number, since it is smaller than the sum of its proper divisors (80652388).

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

72262220 is a wasteful number, since it uses less digits than its factorization.

72262220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27721 (or 27719 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 72262220 is about 8500.7187931374. The cubic root of 72262220 is about 416.5211893910.

Adding to 72262220 its reverse (2226227), we get a palindrome (74488447).

The spelling of 72262220 in words is "seventy-two million, two hundred sixty-two thousand, two hundred twenty".