1639072 has 48 divisors (see below), whose sum is σ = 3592512. Its totient is φ = 732160.

The previous prime is 1639067. The next prime is 1639081. The reversal of 1639072 is 2709361.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1639072.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12447 + ... + 12577.

It is an arithmetic number, because the mean of its divisors is an integer number (74844).

2^1639072 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 1639072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1796256).

1639072 is an abundant number, since it is smaller than the sum of its proper divisors (1953440).

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

1639072 is a wasteful number, since it uses less digits than its factorization.

1639072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 1639072 is about 1280.2624730890. The cubic root of 1639072 is about 117.9051233912.

The spelling of 1639072 in words is "one million, six hundred thirty-nine thousand, seventy-two".