19042388428 has 72 divisors (see below), whose sum is σ = 39381778800. Its totient is φ = 8031647232.

The previous prime is 19042388423. The next prime is 19042388441. The reversal of 19042388428 is 82488324091.

It is a super-2 number, since 2×19042388428² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (19042388423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8140083 + ... + 8142421.

It is an arithmetic number, because the mean of its divisors is an integer number (546969150).

Almost surely, 2^19042388428 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 19042388428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19690889400).

19042388428 is an abundant number, since it is smaller than the sum of its proper divisors (20339390372).

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

19042388428 is a wasteful number, since it uses less digits than its factorization.

19042388428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2999 (or 2990 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 49.

The spelling of 19042388428 in words is "nineteen billion, forty-two million, three hundred eighty-eight thousand, four hundred twenty-eight".