228144642 has 16 divisors (see below), whose sum is σ = 497770272. Its totient is φ = 69134720.

The previous prime is 228144617. The next prime is 228144667. The reversal of 228144642 is 246441822.

It is an interprime number because it is at equal distance from previous prime (228144617) and next prime (228144667).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1728303 + ... + 1728434.

It is an arithmetic number, because the mean of its divisors is an integer number (31110642).

Almost surely, 2^228144642 is an apocalyptic number.

228144642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

228144642 is an abundant number, since it is smaller than the sum of its proper divisors (269625630).

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

228144642 is a wasteful number, since it uses less digits than its factorization.

228144642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3456753.

The product of its digits is 24576, while the sum is 33.

The square root of 228144642 is about 15104.4576863918. The cubic root of 228144642 is about 611.0406334616.

The spelling of 228144642 in words is "two hundred twenty-eight million, one hundred forty-four thousand, six hundred forty-two".