19743828 has 48 divisors (see below), whose sum is σ = 50379840. Its totient is φ = 5981184.

The previous prime is 19743803. The next prime is 19743833. The reversal of 19743828 is 82834791.

It is a self number, because there is not a number n which added to its sum of digits gives 19743828.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9508 + ... + 11396.

It is an arithmetic number, because the mean of its divisors is an integer number (1049580).

Almost surely, 2^19743828 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19743828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25189920).

19743828 is an abundant number, since it is smaller than the sum of its proper divisors (30636012).

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

19743828 is a wasteful number, since it uses less digits than its factorization.

19743828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1976 (or 1974 counting only the distinct ones).

The product of its digits is 96768, while the sum is 42.

The square root of 19743828 is about 4443.4027501454. The cubic root of 19743828 is about 270.2778484077.

The spelling of 19743828 in words is "nineteen million, seven hundred forty-three thousand, eight hundred twenty-eight".