228120379 has 4 divisors (see below), whose sum is σ = 228151080. Its totient is φ = 228089680.

The previous prime is 228120377. The next prime is 228120391. The reversal of 228120379 is 973021822.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 973021822 = 2 ⋅486510911.

It is a cyclic number.

It is not a de Polignac number, because 228120379 - 2¹ = 228120377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228120377) 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 3 ways as a sum of consecutive naturals, for example, 3567 + ... + 21655.

It is an arithmetic number, because the mean of its divisors is an integer number (57037770).

Almost surely, 2^228120379 is an apocalyptic number.

228120379 is a deficient number, since it is larger than the sum of its proper divisors (30701).

228120379 is a wasteful number, since it uses less digits than its factorization.

228120379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30700.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 228120379 is about 15103.6544915461. The cubic root of 228120379 is about 611.0189714663.

The spelling of 228120379 in words is "two hundred twenty-eight million, one hundred twenty thousand, three hundred seventy-nine".