228425988 has 24 divisors (see below), whose sum is σ = 609136192. Its totient is φ = 65264544.

The previous prime is 228425987. The next prime is 228426013. The reversal of 228425988 is 889524822.

It is a happy number.

It is a super-2 number, since 2×228425988² = 104356863987552288, which contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (228425983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1359595 + ... + 1359762.

Almost surely, 2^228425988 is an apocalyptic number.

228425988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

228425988 is an abundant number, since it is smaller than the sum of its proper divisors (380710204).

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

228425988 is a wasteful number, since it uses less digits than its factorization.

228425988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2719371 (or 2719369 counting only the distinct ones).

The product of its digits is 737280, while the sum is 48.

The square root of 228425988 is about 15113.7681601909. The cubic root of 228425988 is about 611.2917069580.

The spelling of 228425988 in words is "two hundred twenty-eight million, four hundred twenty-five thousand, nine hundred eighty-eight".