19212428 has 12 divisors (see below), whose sum is σ = 33810840. Its totient is φ = 9552192.

The previous prime is 19212421. The next prime is 19212463. The reversal of 19212428 is 82421291.

It is a self number, because there is not a number n which added to its sum of digits gives 19212428.

It is not an unprimeable number, because it can be changed into a prime (19212421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12701 + ... + 14132.

It is an arithmetic number, because the mean of its divisors is an integer number (2817570).

Almost surely, 2^19212428 is an apocalyptic number.

It is an amenable number.

19212428 is a deficient number, since it is larger than the sum of its proper divisors (14598412).

19212428 is a wasteful number, since it uses less digits than its factorization.

19212428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27016 (or 27014 counting only the distinct ones).

The product of its digits is 2304, while the sum is 29.

The square root of 19212428 is about 4383.1983756157. The cubic root of 19212428 is about 267.8309433541.

The spelling of 19212428 in words is "nineteen million, two hundred twelve thousand, four hundred twenty-eight".