228347904 has 52 divisors (see below), whose sum is σ = 608886176. Its totient is φ = 76111872.

The previous prime is 228347881. The next prime is 228347921. The reversal of 228347904 is 409743822.

It is a super-2 number, since 2×228347904² = 104285530522386432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2997 + ... + 21579.

Almost surely, 2^228347904 is an apocalyptic number.

228347904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228347904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (304443088).

228347904 is an abundant number, since it is smaller than the sum of its proper divisors (380538272).

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

228347904 is an equidigital number, since it uses as much as digits as its factorization.

228347904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18610 (or 18588 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 228347904 is about 15111.1847318468. The cubic root of 228347904 is about 611.2220453841. Note that the first 3 decimals are identical.

The spelling of 228347904 in words is "two hundred twenty-eight million, three hundred forty-seven thousand, nine hundred four".