228738779 has 2 divisors, whose sum is σ = 228738780. Its totient is φ = 228738778.

The previous prime is 228738767. The next prime is 228738823. The reversal of 228738779 is 977837822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228738779 - 2¹² = 228734683 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 228738779.

It is not a weakly prime, because it can be changed into another prime (228735779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114369389 + 114369390.

It is an arithmetic number, because the mean of its divisors is an integer number (114369390).

Almost surely, 2^228738779 is an apocalyptic number.

228738779 is a deficient number, since it is larger than the sum of its proper divisors (1).

228738779 is an equidigital number, since it uses as much as digits as its factorization.

228738779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2370816, while the sum is 53.

The square root of 228738779 is about 15124.1125028876. The cubic root of 228738779 is about 611.5706001161.

The spelling of 228738779 in words is "two hundred twenty-eight million, seven hundred thirty-eight thousand, seven hundred seventy-nine".