228658740 has 24 divisors (see below), whose sum is σ = 640244640. Its totient is φ = 60975648.

The previous prime is 228658723. The next prime is 228658747. The reversal of 228658740 is 47856822.

It is a happy number.

228658740 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 228658692 and 228658701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228658747) 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, 1905430 + ... + 1905549.

It is an arithmetic number, because the mean of its divisors is an integer number (26676860).

Almost surely, 2^228658740 is an apocalyptic number.

228658740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228658740 is an abundant number, since it is smaller than the sum of its proper divisors (411585900).

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

228658740 is a wasteful number, since it uses less digits than its factorization.

228658740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3810991 (or 3810989 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The square root of 228658740 is about 15121.4661987520. The cubic root of 228658740 is about 611.4992593346.

The spelling of 228658740 in words is "two hundred twenty-eight million, six hundred fifty-eight thousand, seven hundred forty".