1638948 has 24 divisors (see below), whose sum is σ = 3888640. Its totient is φ = 537120.

The previous prime is 1638947. The next prime is 1638977. The reversal of 1638948 is 8498361.

It is not an unprimeable number, because it can be changed into a prime (1638943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388 + ... + 1851.

2^1638948 is an apocalyptic number.

It is an amenable number.

1638948 is an abundant number, since it is smaller than the sum of its proper divisors (2249692).

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

1638948 is a wasteful number, since it uses less digits than its factorization.

1638948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2307 (or 2305 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 1638948 is about 1280.2140446035. The cubic root of 1638948 is about 117.9021500413.

The spelling of 1638948 in words is "one million, six hundred thirty-eight thousand, nine hundred forty-eight".