228729890 has 16 divisors (see below), whose sum is σ = 411958008. Its totient is φ = 91437696.

The previous prime is 228729887. The next prime is 228729899. The reversal of 228729890 is 98927822.

228729890 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 204118369 + 24611521 = 14287^2 + 4961^2 .

It is not an unprimeable number, because it can be changed into a prime (228729899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13934 + ... + 25526.

Almost surely, 2^228729890 is an apocalyptic number.

228729890 is a deficient number, since it is larger than the sum of its proper divisors (183228118).

228729890 is a wasteful number, since it uses less digits than its factorization.

228729890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13573.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 228729890 is about 15123.8186315494. The cubic root of 228729890 is about 611.5626779476.

The spelling of 228729890 in words is "two hundred twenty-eight million, seven hundred twenty-nine thousand, eight hundred ninety".