19161396 has 18 divisors (see below), whose sum is σ = 48435842. Its totient is φ = 6387120.

The previous prime is 19161377. The next prime is 19161403. The reversal of 19161396 is 69316191.

It can be written as a sum of positive squares in only one way, i.e., 17338896 + 1822500 = 4164^2 + 1350^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 532261 = 19161396 / (1 + 9 + 1 + 6 + 1 + 3 + 9 + 6).

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 19161396.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 266095 + ... + 266166.

Almost surely, 2^19161396 is an apocalyptic number.

It is an amenable number.

19161396 is an abundant number, since it is smaller than the sum of its proper divisors (29274446).

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

19161396 is a wasteful number, since it uses less digits than its factorization.

19161396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532271 (or 532266 counting only the distinct ones).

The product of its digits is 8748, while the sum is 36.

The square root of 19161396 is about 4377.3731849135. The cubic root of 19161396 is about 267.5935958035.

The spelling of 19161396 in words is "nineteen million, one hundred sixty-one thousand, three hundred ninety-six".