1897438 has 8 divisors (see below), whose sum is σ = 3013632. Its totient is φ = 892896.

The previous prime is 1897429. The next prime is 1897459. The reversal of 1897438 is 8347981.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1897438.

It is a congruent number.

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, 27870 + ... + 27937.

It is an arithmetic number, because the mean of its divisors is an integer number (376704).

2^1897438 is an apocalyptic number.

1897438 is a deficient number, since it is larger than the sum of its proper divisors (1116194).

1897438 is a wasteful number, since it uses less digits than its factorization.

1897438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55826.

The product of its digits is 48384, while the sum is 40.

The square root of 1897438 is about 1377.4752266375. The cubic root of 1897438 is about 123.8005378047.

The spelling of 1897438 in words is "one million, eight hundred ninety-seven thousand, four hundred thirty-eight".