228770890 has 12 divisors (see below), whose sum is σ = 411873714. Its totient is φ = 91489224.

The previous prime is 228770881. The next prime is 228770891. The reversal of 228770890 is 98077822.

It can be written as a sum of positive squares in only one way, i.e., 205893801 + 22877089 = 14349^2 + 4783^2 .

It is a super-2 number, since 2×228770890² = 104672240222784200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (228770891) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45439 + ... + 50221.

Almost surely, 2^228770890 is an apocalyptic number.

228770890 is a deficient number, since it is larger than the sum of its proper divisors (183102824).

228770890 is an frugal number, since it uses more digits than its factorization.

228770890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9573 (or 4790 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 228770890 is about 15125.1740485854. The cubic root of 228770890 is about 611.5992167835.

The spelling of 228770890 in words is "two hundred twenty-eight million, seven hundred seventy thousand, eight hundred ninety".