1938864 has 40 divisors (see below), whose sum is σ = 5174272. Its totient is φ = 624960.

The previous prime is 1938863. The next prime is 1938883. The reversal of 1938864 is 4688391.

It is a super-2 number, since 2×1938864² = 7518387220992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1938863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 837 + ... + 2139.

2^1938864 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 1938864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2587136).

1938864 is an abundant number, since it is smaller than the sum of its proper divisors (3235408).

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

1938864 is a wasteful number, since it uses less digits than its factorization.

1938864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345 (or 1339 counting only the distinct ones).

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

The square root of 1938864 is about 1392.4309677682. The cubic root of 1938864 is about 124.6950218451.

It can be divided in two parts, 19 and 38864, that added together give a palindrome (38883).

The spelling of 1938864 in words is "one million, nine hundred thirty-eight thousand, eight hundred sixty-four".