19428123 has 48 divisors (see below), whose sum is σ = 32175360. Its totient is φ = 10338240.

The previous prime is 19428121. The next prime is 19428163. The reversal of 19428123 is 32182491.

It is not a de Polignac number, because 19428123 - 2¹ = 19428121 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19428121) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 108448 + ... + 108626.

It is an arithmetic number, because the mean of its divisors is an integer number (670320).

Almost surely, 2^19428123 is an apocalyptic number.

19428123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

19428123 is a deficient number, since it is larger than the sum of its proper divisors (12747237).

19428123 is a wasteful number, since it uses less digits than its factorization.

19428123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 229 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 19428123 is about 4407.7344520740. The cubic root of 19428123 is about 268.8295147447.

The spelling of 19428123 in words is "nineteen million, four hundred twenty-eight thousand, one hundred twenty-three".