1897236 has 48 divisors (see below), whose sum is σ = 5369280. Its totient is φ = 574560.

The previous prime is 1897229. The next prime is 1897237. The reversal of 1897236 is 6327981.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1897236.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1897237) 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 in 15 ways as a sum of consecutive naturals, for example, 390 + ... + 1986.

It is an arithmetic number, because the mean of its divisors is an integer number (111860).

2^1897236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1897236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2684640).

1897236 is an abundant number, since it is smaller than the sum of its proper divisors (3472044).

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

1897236 is a wasteful number, since it uses less digits than its factorization.

1897236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621 (or 1613 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 1897236 is about 1377.4019021331. The cubic root of 1897236 is about 123.7961444075.

The spelling of 1897236 in words is "one million, eight hundred ninety-seven thousand, two hundred thirty-six".