228406637 has 2 divisors, whose sum is σ = 228406638. Its totient is φ = 228406636.

The previous prime is 228406609. The next prime is 228406693. The reversal of 228406637 is 736604822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225330121 + 3076516 = 15011^2 + 1754^2 .

It is a cyclic number.

It is not a de Polignac number, because 228406637 - 2⁶ = 228406573 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228406637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228406037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114203318 + 114203319.

It is an arithmetic number, because the mean of its divisors is an integer number (114203319).

Almost surely, 2^228406637 is an apocalyptic number.

It is an amenable number.

228406637 is a deficient number, since it is larger than the sum of its proper divisors (1).

228406637 is an equidigital number, since it uses as much as digits as its factorization.

228406637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 228406637 is about 15113.1279687562. The cubic root of 228406637 is about 611.2744447075.

The spelling of 228406637 in words is "two hundred twenty-eight million, four hundred six thousand, six hundred thirty-seven".