228930391 has 8 divisors (see below), whose sum is σ = 230330304. Its totient is φ = 227535360.

The previous prime is 228930349. The next prime is 228930407. The reversal of 228930391 is 193039822.

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

It is a cyclic number.

It is not a de Polignac number, because 228930391 - 2¹⁵ = 228897623 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 228930391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228930311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134055 + ... + 135751.

It is an arithmetic number, because the mean of its divisors is an integer number (28791288).

Almost surely, 2^228930391 is an apocalyptic number.

228930391 is a deficient number, since it is larger than the sum of its proper divisors (1399913).

228930391 is a wasteful number, since it uses less digits than its factorization.

228930391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 228930391 is about 15130.4458295187. The cubic root of 228930391 is about 611.7413211459.

The spelling of 228930391 in words is "two hundred twenty-eight million, nine hundred thirty thousand, three hundred ninety-one".