228181974 has 16 divisors (see below), whose sum is σ = 467495280. Its totient is φ = 74205440.

The previous prime is 228181949. The next prime is 228181999. The reversal of 228181974 is 479181822.

228181974 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (228181949) and next prime (228181999).

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 7 ways as a sum of consecutive naturals, for example, 463539 + ... + 464030.

It is an arithmetic number, because the mean of its divisors is an integer number (29218455).

Almost surely, 2^228181974 is an apocalyptic number.

228181974 is an abundant number, since it is smaller than the sum of its proper divisors (239313306).

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

228181974 is a wasteful number, since it uses less digits than its factorization.

228181974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927615.

The product of its digits is 64512, while the sum is 42.

The square root of 228181974 is about 15105.6934299621. The cubic root of 228181974 is about 611.0739604548.

It can be divided in two parts, 2281 and 81974, that added together give a triangular number (84255 = T₄₁₀).

The spelling of 228181974 in words is "two hundred twenty-eight million, one hundred eighty-one thousand, nine hundred seventy-four".