19397412 has 18 divisors (see below), whose sum is σ = 49032438. Its totient is φ = 6465792.

The previous prime is 19397407. The next prime is 19397431. The reversal of 19397412 is 21479391.

It can be written as a sum of positive squares in only one way, i.e., 18870336 + 527076 = 4344^2 + 726^2 .

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: 538817 = 19397412 / (1 + 9 + 3 + 9 + 7 + 4 + 1 + 2).

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, 269373 + ... + 269444.

Almost surely, 2^19397412 is an apocalyptic number.

19397412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19397412 is an abundant number, since it is smaller than the sum of its proper divisors (29635026).

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

19397412 is a wasteful number, since it uses less digits than its factorization.

19397412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538827 (or 538822 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 19397412 is about 4404.2493117443. The cubic root of 19397412 is about 268.6877893142.

The spelling of 19397412 in words is "nineteen million, three hundred ninety-seven thousand, four hundred twelve".