19223028 has 72 divisors (see below), whose sum is σ = 54817280. Its totient is φ = 5821200.

The previous prime is 19223023. The next prime is 19223033. The reversal of 19223028 is 82032291.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (19223023) and next prime (19223033).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 19222992 and 19223010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19223023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12333 + ... + 13803.

Almost surely, 2^19223028 is an apocalyptic number.

19223028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19223028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27408640).

19223028 is an abundant number, since it is smaller than the sum of its proper divisors (35594252).

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

19223028 is a wasteful number, since it uses less digits than its factorization.

19223028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506 (or 1487 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 19223028 is about 4384.4073715840. The cubic root of 19223028 is about 267.8801907482.

It can be divided in two parts, 1922 and 3028, that added together give a triangular number (4950 = T₉₉).

The spelling of 19223028 in words is "nineteen million, two hundred twenty-three thousand, twenty-eight".