19490328 has 128 divisors (see below), whose sum is σ = 63705600. Its totient is φ = 5443200.

The previous prime is 19490323. The next prime is 19490329. The reversal of 19490328 is 82309491.

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 = 19490292 and 19490301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19490323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30573 + ... + 31203.

It is an arithmetic number, because the mean of its divisors is an integer number (497700).

Almost surely, 2^19490328 is an apocalyptic number.

19490328 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 19490328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31852800).

19490328 is an abundant number, since it is smaller than the sum of its proper divisors (44215272).

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

19490328 is a wasteful number, since it uses less digits than its factorization.

19490328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670 (or 660 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 19490328 is about 4414.7851589857. The cubic root of 19490328 is about 269.1161220205.

The spelling of 19490328 in words is "nineteen million, four hundred ninety thousand, three hundred twenty-eight".