19434378 has 32 divisors (see below), whose sum is σ = 41149440. Its totient is φ = 6102000.

The previous prime is 19434353. The next prime is 19434391. The reversal of 19434378 is 87343491.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon 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, 25503 + ... + 26253.

It is an arithmetic number, because the mean of its divisors is an integer number (1285920).

Almost surely, 2^19434378 is an apocalyptic number.

19434378 is an abundant number, since it is smaller than the sum of its proper divisors (21715062).

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

19434378 is a wasteful number, since it uses less digits than its factorization.

19434378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002.

The product of its digits is 72576, while the sum is 39.

The square root of 19434378 is about 4408.4439431618. The cubic root of 19434378 is about 268.8583620706.

The spelling of 19434378 in words is "nineteen million, four hundred thirty-four thousand, three hundred seventy-eight".