228486437 has 4 divisors (see below), whose sum is σ = 228517740. Its totient is φ = 228455136.

The previous prime is 228486431. The next prime is 228486487. The reversal of 228486437 is 734684822.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 176199076 + 52287361 = 13274^2 + 7231^2 .

It is a cyclic number.

It is not a de Polignac number, because 228486437 - 2¹² = 228482341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228486431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1739 + ... + 21447.

It is an arithmetic number, because the mean of its divisors is an integer number (57129435).

Almost surely, 2^228486437 is an apocalyptic number.

It is an amenable number.

228486437 is a deficient number, since it is larger than the sum of its proper divisors (31303).

228486437 is a wasteful number, since it uses less digits than its factorization.

228486437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31302.

The product of its digits is 516096, while the sum is 44.

The square root of 228486437 is about 15115.7678270077. The cubic root of 228486437 is about 611.3456248063.

The spelling of 228486437 in words is "two hundred twenty-eight million, four hundred eighty-six thousand, four hundred thirty-seven".