1638952 has 48 divisors (see below), whose sum is σ = 3703860. Its totient is φ = 677376.

The previous prime is 1638947. The next prime is 1638977. The reversal of 1638952 is 2598361.

It can be written as a sum of positive squares in 2 ways, for example, as 1623076 + 15876 = 1274^2 + 126^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14448 + ... + 14560.

2^1638952 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 1638952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1851930).

1638952 is an abundant number, since it is smaller than the sum of its proper divisors (2064908).

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

1638952 is a wasteful number, since it uses less digits than its factorization.

1638952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 159 counting only the distinct ones).

The product of its digits is 12960, while the sum is 34.

The square root of 1638952 is about 1280.2156068413. The cubic root of 1638952 is about 117.9022459581.

The spelling of 1638952 in words is "one million, six hundred thirty-eight thousand, nine hundred fifty-two".