228423978 has 24 divisors (see below), whose sum is σ = 498820608. Its totient is φ = 75541032.

The previous prime is 228423961. The next prime is 228423983. The reversal of 228423978 is 879324822.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47676 + ... + 52247.

It is an arithmetic number, because the mean of its divisors is an integer number (20784192).

Almost surely, 2^228423978 is an apocalyptic number.

228423978 is an abundant number, since it is smaller than the sum of its proper divisors (270396630).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228423978 is a wasteful number, since it uses less digits than its factorization.

228423978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100058 (or 100055 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 228423978 is about 15113.7016643839. The cubic root of 228423978 is about 611.2899139630.

It can be divided in two parts, 2284 and 23978, that added together give a palindrome (26262).

The spelling of 228423978 in words is "two hundred twenty-eight million, four hundred twenty-three thousand, nine hundred seventy-eight".