228706990 has 32 divisors (see below), whose sum is σ = 445065120. Its totient is φ = 84322944.

The previous prime is 228706957. The next prime is 228706991. The reversal of 228706990 is 99607822.

It is a happy number.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228706991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9237 + ... + 23296.

It is an arithmetic number, because the mean of its divisors is an integer number (13908285).

Almost surely, 2^228706990 is an apocalyptic number.

228706990 is a deficient number, since it is larger than the sum of its proper divisors (216358130).

228706990 is a wasteful number, since it uses less digits than its factorization.

228706990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32596.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 228706990 is about 15123.0615286720. The cubic root of 228706990 is about 611.5422677704.

The spelling of 228706990 in words is "two hundred twenty-eight million, seven hundred six thousand, nine hundred ninety".