228959391 has 8 divisors (see below), whose sum is σ = 312378880. Its totient is φ = 149089752.

The previous prime is 228959387. The next prime is 228959407. The reversal of 228959391 is 193959822.

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

It is not a de Polignac number, because 228959391 - 2² = 228959387 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 228959391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228959191) 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, 887311 + ... + 887568.

It is an arithmetic number, because the mean of its divisors is an integer number (39047360).

Almost surely, 2^228959391 is an apocalyptic number.

228959391 is a deficient number, since it is larger than the sum of its proper divisors (83419489).

228959391 is a wasteful number, since it uses less digits than its factorization.

228959391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774925.

The product of its digits is 349920, while the sum is 48.

The square root of 228959391 is about 15131.4041318048. The cubic root of 228959391 is about 611.7671510488.

The spelling of 228959391 in words is "two hundred twenty-eight million, nine hundred fifty-nine thousand, three hundred ninety-one".