228268690 has 32 divisors (see below), whose sum is σ = 468523440. Its totient is φ = 79325184.

The previous prime is 228268643. The next prime is 228268697. The reversal of 228268690 is 96862822.

It is a happy number.

228268690 is digitally balanced in base 2, 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 8 ways, for example, as 27678121 + 200590569 = 5261^2 + 14163^2 .

It is a super-2 number, since 2×228268690² = 104213189668632200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (228268697) 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, 49435 + ... + 53854.

Almost surely, 2^228268690 is an apocalyptic number.

228268690 is an abundant number, since it is smaller than the sum of its proper divisors (240254750).

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

228268690 is a wasteful number, since it uses less digits than its factorization.

228268690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103326.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 228268690 is about 15108.5634657965. The cubic root of 228268690 is about 611.1513594673.

The spelling of 228268690 in words is "two hundred twenty-eight million, two hundred sixty-eight thousand, six hundred ninety".