228001399 has 4 divisors (see below), whose sum is σ = 241413264. Its totient is φ = 214589536.

The previous prime is 228001381. The next prime is 228001409. The reversal of 228001399 is 993100822.

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 228001399 - 2⁹ = 228000887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228001309) 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, 6705907 + ... + 6705940.

It is an arithmetic number, because the mean of its divisors is an integer number (60353316).

Almost surely, 2^228001399 is an apocalyptic number.

228001399 is a deficient number, since it is larger than the sum of its proper divisors (13411865).

228001399 is a wasteful number, since it uses less digits than its factorization.

228001399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13411864.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 228001399 is about 15099.7151959896. The cubic root of 228001399 is about 610.9127239369.

The spelling of 228001399 in words is "two hundred twenty-eight million, one thousand, three hundred ninety-nine".