163428 has 12 divisors (see below), whose sum is σ = 381360. Its totient is φ = 54472.

The previous prime is 163417. The next prime is 163433. The reversal of 163428 is 824361.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×163428² = 53417422368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 163398 and 163407.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6798 + ... + 6821.

It is an arithmetic number, because the mean of its divisors is an integer number (31780).

2¹⁶³⁴²⁸ is an apocalyptic number.

It is an amenable number.

163428 is an abundant number, since it is smaller than the sum of its proper divisors (217932).

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

163428 is a wasteful number, since it uses less digits than its factorization.

163428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13626 (or 13624 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

The square root of 163428 is about 404.2622910933. The cubic root of 163428 is about 54.6733252515.

Adding to 163428 its reverse (824361), we get a palindrome (987789).

The spelling of 163428 in words is "one hundred sixty-three thousand, four hundred twenty-eight".