228447140 has 24 divisors (see below), whose sum is σ = 484227072. Its totient is φ = 90524000.

The previous prime is 228447133. The next prime is 228447143. The reversal of 228447140 is 41744822.

It is a junction number, because it is equal to n+sod(n) for n = 228447097 and 228447106.

It is not an unprimeable number, because it can be changed into a prime (228447143) 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, 51236 + ... + 55515.

It is an arithmetic number, because the mean of its divisors is an integer number (20176128).

Almost surely, 2^228447140 is an apocalyptic number.

228447140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228447140 is an abundant number, since it is smaller than the sum of its proper divisors (255779932).

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

228447140 is a wasteful number, since it uses less digits than its factorization.

228447140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106867 (or 106865 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 32.

The square root of 228447140 is about 15114.4679033038. The cubic root of 228447140 is about 611.3105746931.

The spelling of 228447140 in words is "two hundred twenty-eight million, four hundred forty-seven thousand, one hundred forty".