228778692 has 12 divisors (see below), whose sum is σ = 533816976. Its totient is φ = 76259560.

The previous prime is 228778691. The next prime is 228778699. The reversal of 228778692 is 296877822.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (228778691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9532434 + ... + 9532457.

It is an arithmetic number, because the mean of its divisors is an integer number (44484748).

Almost surely, 2^228778692 is an apocalyptic number.

It is an amenable number.

228778692 is an abundant number, since it is smaller than the sum of its proper divisors (305038284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228778692 is a wasteful number, since it uses less digits than its factorization.

228778692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19064898 (or 19064896 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 51.

The square root of 228778692 is about 15125.4319607739. The cubic root of 228778692 is about 611.6061693622.

The spelling of 228778692 in words is "two hundred twenty-eight million, seven hundred seventy-eight thousand, six hundred ninety-two".