228642100 has 36 divisors (see below), whose sum is σ = 496815424. Its totient is φ = 91334880.

The previous prime is 228642097. The next prime is 228642107. The reversal of 228642100 is 1246822.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228642107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131839 + ... + 133561.

Almost surely, 2^228642100 is an apocalyptic number.

228642100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228642100 is an abundant number, since it is smaller than the sum of its proper divisors (268173324).

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

228642100 is a wasteful number, since it uses less digits than its factorization.

228642100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3064 (or 3057 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 228642100 is about 15120.9159775458. The cubic root of 228642100 is about 611.4844255923.

Adding to 228642100 its reverse (1246822), we get a palindrome (229888922).

It can be divided in two parts, 22864 and 2100, that added together give a square (24964 = 158²).

The spelling of 228642100 in words is "two hundred twenty-eight million, six hundred forty-two thousand, one hundred".