72443228 has 48 divisors (see below), whose sum is σ = 152621280. Its totient is φ = 29644800.

The previous prime is 72443227. The next prime is 72443251. The reversal of 72443228 is 82234427.

It is a junction number, because it is equal to n+sod(n) for n = 72443194 and 72443203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72443221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21908 + ... + 24996.

It is an arithmetic number, because the mean of its divisors is an integer number (3179610).

Almost surely, 2^72443228 is an apocalyptic number.

It is an amenable number.

72443228 is an abundant number, since it is smaller than the sum of its proper divisors (80178052).

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

72443228 is a wasteful number, since it uses less digits than its factorization.

72443228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3158 (or 3156 counting only the distinct ones).

The product of its digits is 21504, while the sum is 32.

The square root of 72443228 is about 8511.3587634408. The cubic root of 72443228 is about 416.8686775818.

The spelling of 72443228 in words is "seventy-two million, four hundred forty-three thousand, two hundred twenty-eight".