228120445 has 16 divisors (see below), whose sum is σ = 315624960. Its totient is φ = 155038464.

The previous prime is 228120391. The next prime is 228120449. The reversal of 228120445 is 544021822.

It is not a de Polignac number, because 228120445 - 2¹⁷ = 227989373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228120449) 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, 24885 + ... + 32794.

It is an arithmetic number, because the mean of its divisors is an integer number (19726560).

Almost surely, 2^228120445 is an apocalyptic number.

It is an amenable number.

228120445 is a deficient number, since it is larger than the sum of its proper divisors (87504515).

228120445 is a wasteful number, since it uses less digits than its factorization.

228120445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57804.

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 228120445 is about 15103.6566764476. The cubic root of 228120445 is about 611.0190303931.

The spelling of 228120445 in words is "two hundred twenty-eight million, one hundred twenty thousand, four hundred forty-five".