19378442 has 8 divisors (see below), whose sum is σ = 30597600. Its totient is φ = 9179244.

The previous prime is 19378439. The next prime is 19378481. The reversal of 19378442 is 24487391.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 509959 = 19378442 / (1 + 9 + 3 + 7 + 8 + 4 + 4 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 19378396 and 19378405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254942 + ... + 255017.

It is an arithmetic number, because the mean of its divisors is an integer number (3824700).

Almost surely, 2^19378442 is an apocalyptic number.

19378442 is a deficient number, since it is larger than the sum of its proper divisors (11219158).

19378442 is a wasteful number, since it uses less digits than its factorization.

19378442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509980.

The product of its digits is 48384, while the sum is 38.

The square root of 19378442 is about 4402.0951829782. The cubic root of 19378442 is about 268.6001716150.

The spelling of 19378442 in words is "nineteen million, three hundred seventy-eight thousand, four hundred forty-two".