228238587 has 8 divisors (see below), whose sum is σ = 338131280. Its totient is φ = 152159040.

The previous prime is 228238579. The next prime is 228238589. The reversal of 228238587 is 785832822.

It is not a de Polignac number, because 228238587 - 2³ = 228238579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228238589) 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, 4226614 + ... + 4226667.

It is an arithmetic number, because the mean of its divisors is an integer number (42266410).

Almost surely, 2^228238587 is an apocalyptic number.

228238587 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

228238587 is a deficient number, since it is larger than the sum of its proper divisors (109892693).

228238587 is an equidigital number, since it uses as much as digits as its factorization.

228238587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8453290 (or 8453284 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The square root of 228238587 is about 15107.5672098455. The cubic root of 228238587 is about 611.1244930317.

The spelling of 228238587 in words is "two hundred twenty-eight million, two hundred thirty-eight thousand, five hundred eighty-seven".