19797378 has 8 divisors (see below), whose sum is σ = 39594768. Its totient is φ = 6599124.

The previous prime is 19797359. The next prime is 19797389. The reversal of 19797378 is 87379791.

It is a happy number.

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

19797378 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 19797378.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1649776 + ... + 1649787.

It is an arithmetic number, because the mean of its divisors is an integer number (4949346).

Almost surely, 2^19797378 is an apocalyptic number.

19797378 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

19797378 is a wasteful number, since it uses less digits than its factorization.

19797378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3299568.

The product of its digits is 666792, while the sum is 51.

The square root of 19797378 is about 4449.4244571630. The cubic root of 19797378 is about 270.5219806224.

The spelling of 19797378 in words is "nineteen million, seven hundred ninety-seven thousand, three hundred seventy-eight".