1988447 has 4 divisors (see below), whose sum is σ = 2015760. Its totient is φ = 1961136.

The previous prime is 1988423. The next prime is 1988453. The reversal of 1988447 is 7448891.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7448891 = 359 ⋅20749.

It is a cyclic number.

It is not a de Polignac number, because 1988447 - 2¹² = 1984351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1988347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13547 + ... + 13692.

It is an arithmetic number, because the mean of its divisors is an integer number (503940).

2^1988447 is an apocalyptic number.

1988447 is a deficient number, since it is larger than the sum of its proper divisors (27313).

1988447 is an equidigital number, since it uses as much as digits as its factorization.

1988447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27312.

The product of its digits is 64512, while the sum is 41.

The square root of 1988447 is about 1410.1230442766. The cubic root of 1988447 is about 125.7490385644.

The spelling of 1988447 in words is "one million, nine hundred eighty-eight thousand, four hundred forty-seven".