228778737 has 12 divisors (see below), whose sum is σ = 332895504. Its totient is φ = 138601120.

The previous prime is 228778727. The next prime is 228778763. The reversal of 228778737 is 737877822.

It is not a de Polignac number, because 228778737 - 2¹⁰ = 228777713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228778737.

It is not an unprimeable number, because it can be changed into a prime (228778717) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85573 + ... + 88205.

It is an arithmetic number, because the mean of its divisors is an integer number (27741292).

Almost surely, 2^228778737 is an apocalyptic number.

It is an amenable number.

228778737 is a deficient number, since it is larger than the sum of its proper divisors (104116767).

228778737 is an frugal number, since it uses more digits than its factorization.

228778737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5280 (or 2647 counting only the distinct ones).

The product of its digits is 1843968, while the sum is 51.

The square root of 228778737 is about 15125.4334483346. The cubic root of 228778737 is about 611.6062094625.

The spelling of 228778737 in words is "two hundred twenty-eight million, seven hundred seventy-eight thousand, seven hundred thirty-seven".