73621228 has 12 divisors (see below), whose sum is σ = 128899512. Its totient is φ = 36792800.

The previous prime is 73621217. The next prime is 73621241. The reversal of 73621228 is 82212637.

It is a self number, because there is not a number n which added to its sum of digits gives 73621228.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10203 + ... + 15853.

It is an arithmetic number, because the mean of its divisors is an integer number (10741626).

Almost surely, 2^73621228 is an apocalyptic number.

It is an amenable number.

73621228 is a deficient number, since it is larger than the sum of its proper divisors (55278284).

73621228 is a wasteful number, since it uses less digits than its factorization.

73621228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8912 (or 8910 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 73621228 is about 8580.2813473685. The cubic root of 73621228 is about 419.1161078918.

The spelling of 73621228 in words is "seventy-three million, six hundred twenty-one thousand, two hundred twenty-eight".