228621572 has 6 divisors (see below), whose sum is σ = 400087758. Its totient is φ = 114310784.

The previous prime is 228621571. The next prime is 228621629. The reversal of 228621572 is 275126822.

It can be written as a sum of positive squares in only one way, i.e., 228191236 + 430336 = 15106^2 + 656^2 .

It is not an unprimeable number, because it can be changed into a prime (228621571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28577693 + ... + 28577700.

It is an arithmetic number, because the mean of its divisors is an integer number (66681293).

Almost surely, 2^228621572 is an apocalyptic number.

It is an amenable number.

228621572 is a deficient number, since it is larger than the sum of its proper divisors (171466186).

228621572 is a wasteful number, since it uses less digits than its factorization.

228621572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57155397 (or 57155395 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 228621572 is about 15120.2371674521. The cubic root of 228621572 is about 611.4661248973.

The spelling of 228621572 in words is "two hundred twenty-eight million, six hundred twenty-one thousand, five hundred seventy-two".