228491400 has 48 divisors (see below), whose sum is σ = 708325200. Its totient is φ = 60930880.

The previous prime is 228491371. The next prime is 228491413. The reversal of 228491400 is 4194822.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 189810 + ... + 191009.

It is an arithmetic number, because the mean of its divisors is an integer number (14756775).

Almost surely, 2^228491400 is an apocalyptic number.

228491400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228491400 is an abundant number, since it is smaller than the sum of its proper divisors (479833800).

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

228491400 is a wasteful number, since it uses less digits than its factorization.

228491400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380838 (or 380829 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 228491400 is about 15115.9319924376. The cubic root of 228491400 is about 611.3500511615.

The spelling of 228491400 in words is "two hundred twenty-eight million, four hundred ninety-one thousand, four hundred".