1988424 has 24 divisors (see below), whose sum is σ = 5385510. Its totient is φ = 662784.

The previous prime is 1988423. The next prime is 1988453. The reversal of 1988424 is 4248891.

It can be written as a sum of positive squares in only one way, i.e., 1988100 + 324 = 1410^2 + 18^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1988423) 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 5 ways as a sum of consecutive naturals, for example, 13737 + ... + 13880.

2^1988424 is an apocalyptic number.

It is an amenable number.

1988424 is an abundant number, since it is smaller than the sum of its proper divisors (3397086).

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

1988424 is a wasteful number, since it uses less digits than its factorization.

1988424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27629 (or 27622 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 1988424 is about 1410.1148889364. The cubic root of 1988424 is about 125.7485537239.

The spelling of 1988424 in words is "one million, nine hundred eighty-eight thousand, four hundred twenty-four".