243628 has 36 divisors (see below), whose sum is σ = 545832. Its totient is φ = 94080.

The previous prime is 243623. The next prime is 243631. The reversal of 243628 is 826342.

It is a happy number.

It is a Smith number, since the sum of its digits (25) 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 (243623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2100 + ... + 2212.

It is an arithmetic number, because the mean of its divisors is an integer number (15162).

2²⁴³⁶²⁸ is an apocalyptic number.

243628 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272916).

243628 is an abundant number, since it is smaller than the sum of its proper divisors (302204).

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

243628 is a wasteful number, since it uses less digits than its factorization.

243628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 133 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

The square root of 243628 is about 493.5868717865. The cubic root of 243628 is about 62.4562253476.

The spelling of 243628 in words is "two hundred forty-three thousand, six hundred twenty-eight".