228739890 has 16 divisors (see below), whose sum is σ = 548975808. Its totient is φ = 60997296.

The previous prime is 228739877. The next prime is 228739963. The reversal of 228739890 is 98937822.

It is a happy number.

228739890 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3812302 + ... + 3812361.

It is an arithmetic number, because the mean of its divisors is an integer number (34310988).

Almost surely, 2^228739890 is an apocalyptic number.

228739890 is an abundant number, since it is smaller than the sum of its proper divisors (320235918).

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

228739890 is a wasteful number, since it uses less digits than its factorization.

228739890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7624673.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 228739890 is about 15124.1492322709. The cubic root of 228739890 is about 611.5715902614.

The spelling of 228739890 in words is "two hundred twenty-eight million, seven hundred thirty-nine thousand, eight hundred ninety".