105428 has 6 divisors (see below), whose sum is σ = 184506. Its totient is φ = 52712.

The previous prime is 105407. The next prime is 105437. The reversal of 105428 is 824501.

It can be written as a sum of positive squares in only one way, i.e., 85264 + 20164 = 292^2 + 142^2 .

It is a super-2 number, since 2×105428² = 22230126368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13175 + ... + 13182.

It is an arithmetic number, because the mean of its divisors is an integer number (30751).

2¹⁰⁵⁴²⁸ is an apocalyptic number.

It is an amenable number.

105428 is a deficient number, since it is larger than the sum of its proper divisors (79078).

105428 is a wasteful number, since it uses less digits than its factorization.

105428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26361 (or 26359 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 105428 is about 324.6967816286. The cubic root of 105428 is about 47.2409536352.

Adding to 105428 its reverse (824501), we get a palindrome (929929).

The spelling of 105428 in words is "one hundred five thousand, four hundred twenty-eight".