228400067 has 4 divisors (see below), whose sum is σ = 261028656. Its totient is φ = 195771480.

The previous prime is 228400063. The next prime is 228400069. The reversal of 228400067 is 760004822.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 228400067 - 2² = 228400063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228400063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16314284 + ... + 16314297.

It is an arithmetic number, because the mean of its divisors is an integer number (65257164).

Almost surely, 2^228400067 is an apocalyptic number.

228400067 is a deficient number, since it is larger than the sum of its proper divisors (32628589).

228400067 is an equidigital number, since it uses as much as digits as its factorization.

228400067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32628588.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 228400067 is about 15112.9106064980. The cubic root of 228400067 is about 611.2685836525.

Adding to 228400067 its reverse (760004822), we get a palindrome (988404889).

The spelling of 228400067 in words is "two hundred twenty-eight million, four hundred thousand, sixty-seven".