19427328 has 156 divisors (see below), whose sum is σ = 61334208. Its totient is φ = 5898240.

The previous prime is 19427327. The next prime is 19427339. The reversal of 19427328 is 82372491.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 19427292 and 19427301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19427321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 626673 + ... + 626703.

It is an arithmetic number, because the mean of its divisors is an integer number (393168).

Almost surely, 2^19427328 is an apocalyptic number.

19427328 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 19427328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30667104).

19427328 is an abundant number, since it is smaller than the sum of its proper divisors (41906880).

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

19427328 is a wasteful number, since it uses less digits than its factorization.

19427328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 53 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 19427328 is about 4407.6442687676. The cubic root of 19427328 is about 268.8258478545.

The spelling of 19427328 in words is "nineteen million, four hundred twenty-seven thousand, three hundred twenty-eight".