1897748 has 6 divisors (see below), whose sum is σ = 3321066. Its totient is φ = 948872.

The previous prime is 1897741. The next prime is 1897751. The reversal of 1897748 is 8477981.

It can be written as a sum of positive squares in only one way, i.e., 1669264 + 228484 = 1292^2 + 478^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1897699 and 1897708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1897741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237215 + ... + 237222.

It is an arithmetic number, because the mean of its divisors is an integer number (553511).

2^1897748 is an apocalyptic number.

It is an amenable number.

1897748 is a deficient number, since it is larger than the sum of its proper divisors (1423318).

1897748 is a wasteful number, since it uses less digits than its factorization.

1897748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474441 (or 474439 counting only the distinct ones).

The product of its digits is 112896, while the sum is 44.

The square root of 1897748 is about 1377.5877467515. The cubic root of 1897748 is about 123.8072795404.

The spelling of 1897748 in words is "one million, eight hundred ninety-seven thousand, seven hundred forty-eight".