1897984 has 40 divisors (see below), whose sum is σ = 4149288. Its totient is φ = 860160.

The previous prime is 1897979. The next prime is 1897991. The reversal of 1897984 is 4897981.

It is a happy number.

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, 5464 + ... + 5800.

2^1897984 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 1897984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2074644).

1897984 is an abundant number, since it is smaller than the sum of its proper divisors (2251304).

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

1897984 is an equidigital number, since it uses as much as digits as its factorization.

1897984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366 (or 350 counting only the distinct ones).

The product of its digits is 145152, while the sum is 46.

The square root of 1897984 is about 1377.6734010643. The cubic root of 1897984 is about 123.8124114664.

The spelling of 1897984 in words is "one million, eight hundred ninety-seven thousand, nine hundred eighty-four".