1639248 has 80 divisors (see below), whose sum is σ = 4749696. Its totient is φ = 483840.

The previous prime is 1639243. The next prime is 1639271. The reversal of 1639248 is 8429361.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1639241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23053 + ... + 23123.

2^1639248 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 1639248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2374848).

1639248 is an abundant number, since it is smaller than the sum of its proper divisors (3110448).

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

1639248 is a wasteful number, since it uses less digits than its factorization.

1639248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 126 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 1639248 is about 1280.3312071492. The cubic root of 1639248 is about 117.9093433724.

The spelling of 1639248 in words is "one million, six hundred thirty-nine thousand, two hundred forty-eight".