1938538 has 24 divisors (see below), whose sum is σ = 3430944. Its totient is φ = 819000.

The previous prime is 1938533. The next prime is 1938553. The reversal of 1938538 is 8358391.

It is a junction number, because it is equal to n+sod(n) for n = 1938497 and 1938506.

It is not an unprimeable number, because it can be changed into a prime (1938533) 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 11 ways as a sum of consecutive naturals, for example, 12763 + ... + 12913.

It is an arithmetic number, because the mean of its divisors is an integer number (142956).

2^1938538 is an apocalyptic number.

1938538 is a deficient number, since it is larger than the sum of its proper divisors (1492406).

1938538 is a wasteful number, since it uses less digits than its factorization.

1938538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 291 counting only the distinct ones).

The product of its digits is 25920, while the sum is 37.

The square root of 1938538 is about 1392.3139013886. The cubic root of 1938538 is about 124.6880327257.

The spelling of 1938538 in words is "one million, nine hundred thirty-eight thousand, five hundred thirty-eight".