3958638 has 16 divisors (see below), whose sum is σ = 8173056. Its totient is φ = 1276920.

The previous prime is 3958627. The next prime is 3958657. The reversal of 3958638 is 8368593.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3958638.

It is a congruent number.

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, 10456 + ... + 10827.

It is an arithmetic number, because the mean of its divisors is an integer number (510816).

Almost surely, 2^3958638 is an apocalyptic number.

3958638 is an abundant number, since it is smaller than the sum of its proper divisors (4214418).

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

3958638 is a wasteful number, since it uses less digits than its factorization.

3958638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21319.

The product of its digits is 155520, while the sum is 42.

The square root of 3958638 is about 1989.6326294067. The cubic root of 3958638 is about 158.1910576642.

The spelling of 3958638 in words is "three million, nine hundred fifty-eight thousand, six hundred thirty-eight".