19448428140 has 72 divisors (see below), whose sum is σ = 59012553600. Its totient is φ = 5184578304.

The previous prime is 19448428081. The next prime is 19448428147. The reversal of 19448428140 is 4182484491.

19448428140 is a `hidden beast` number, since 1 + 9 + 4 + 484 + 28 + 140 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (19448428147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 605157 + ... + 636483.

It is an arithmetic number, because the mean of its divisors is an integer number (819618800).

Almost surely, 2^19448428140 is an apocalyptic number.

19448428140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19448428140 is an abundant number, since it is smaller than the sum of its proper divisors (39564125460).

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

19448428140 is a wasteful number, since it uses less digits than its factorization.

19448428140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34791 (or 34786 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 45.

The spelling of 19448428140 in words is "nineteen billion, four hundred forty-eight million, four hundred twenty-eight thousand, one hundred forty".