228022638 has 16 divisors (see below), whose sum is σ = 468371280. Its totient is φ = 73953216.

The previous prime is 228022633. The next prime is 228022643. The reversal of 228022638 is 836220822.

It is an interprime number because it is at equal distance from previous prime (228022633) and next prime (228022643).

It is a junction number, because it is equal to n+sod(n) for n = 228022599 and 228022608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228022633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513343 + ... + 513786.

It is an arithmetic number, because the mean of its divisors is an integer number (29273205).

Almost surely, 2^228022638 is an apocalyptic number.

228022638 is an abundant number, since it is smaller than the sum of its proper divisors (240348642).

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

228022638 is a wasteful number, since it uses less digits than its factorization.

228022638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027171.

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 228022638 is about 15100.4184710226. The cubic root of 228022638 is about 610.9316927861.

The spelling of 228022638 in words is "two hundred twenty-eight million, twenty-two thousand, six hundred thirty-eight".