228581977 has 8 divisors (see below), whose sum is σ = 246645000. Its totient is φ = 210587520.

The previous prime is 228581971. The next prime is 228582007. The reversal of 228581977 is 779185822.

It can be written as a sum of positive squares in 4 ways, for example, as 25918281 + 202663696 = 5091^2 + 14236^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 228581977 - 2⁷ = 228581849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 228581977.

It is not an unprimeable number, because it can be changed into a prime (228581971) 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 7 ways as a sum of consecutive naturals, for example, 10102 + ... + 23647.

It is an arithmetic number, because the mean of its divisors is an integer number (30830625).

Almost surely, 2^228581977 is an apocalyptic number.

It is an amenable number.

228581977 is a deficient number, since it is larger than the sum of its proper divisors (18063023).

228581977 is a wasteful number, since it uses less digits than its factorization.

228581977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34283.

The product of its digits is 564480, while the sum is 49.

The square root of 228581977 is about 15118.9277728283. The cubic root of 228581977 is about 611.4308228932.

The spelling of 228581977 in words is "two hundred twenty-eight million, five hundred eighty-one thousand, nine hundred seventy-seven".