109428 has 24 divisors (see below), whose sum is σ = 278880. Its totient is φ = 33120.

The previous prime is 109423. The next prime is 109433. The reversal of 109428 is 824901.

It is an interprime number because it is at equal distance from previous prime (109423) and next prime (109433).

It is a junction number, because it is equal to n+sod(n) for n = 109398 and 109407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109423) 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, 283 + ... + 546.

It is an arithmetic number, because the mean of its divisors is an integer number (11620).

2¹⁰⁹⁴²⁸ is an apocalyptic number.

It is an amenable number.

109428 is an abundant number, since it is smaller than the sum of its proper divisors (169452).

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

109428 is a wasteful number, since it uses less digits than its factorization.

109428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847 (or 845 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 109428 is about 330.7990326467. The cubic root of 109428 is about 47.8310029202.

The spelling of 109428 in words is "one hundred nine thousand, four hundred twenty-eight".