228444540 has 48 divisors (see below), whose sum is σ = 649203072. Its totient is φ = 60008256.

The previous prime is 228444539. The next prime is 228444613. The reversal of 228444540 is 45444822.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 24394 + ... + 32433.

It is an arithmetic number, because the mean of its divisors is an integer number (13525064).

Almost surely, 2^228444540 is an apocalyptic number.

228444540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228444540 is an abundant number, since it is smaller than the sum of its proper divisors (420758532).

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

228444540 is a wasteful number, since it uses less digits than its factorization.

228444540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56906 (or 56904 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 33.

The square root of 228444540 is about 15114.3818927537. The cubic root of 228444540 is about 611.3082555373.

The spelling of 228444540 in words is "two hundred twenty-eight million, four hundred forty-four thousand, five hundred forty".