228363920 has 20 divisors (see below), whose sum is σ = 530946300. Its totient is φ = 91345536.

The previous prime is 228363917. The next prime is 228363977. The reversal of 228363920 is 29363822.

It can be written as a sum of positive squares in 2 ways, for example, as 142468096 + 85895824 = 11936^2 + 9268^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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 3 ways as a sum of consecutive naturals, for example, 1427195 + ... + 1427354.

It is an arithmetic number, because the mean of its divisors is an integer number (26547315).

Almost surely, 2^228363920 is an apocalyptic number.

228363920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228363920 is an abundant number, since it is smaller than the sum of its proper divisors (302582380).

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

228363920 is a wasteful number, since it uses less digits than its factorization.

228363920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2854562 (or 2854556 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 228363920 is about 15111.7146611495. The cubic root of 228363920 is about 611.2363351342.

The spelling of 228363920 in words is "two hundred twenty-eight million, three hundred sixty-three thousand, nine hundred twenty".