1938445 has 8 divisors (see below), whose sum is σ = 2365920. Its totient is φ = 1524240.

The previous prime is 1938427. The next prime is 1938449. The reversal of 1938445 is 5448391.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1938445 - 2⁷ = 1938317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1938445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1938449) 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, 2991 + ... + 3580.

It is an arithmetic number, because the mean of its divisors is an integer number (295740).

2^1938445 is an apocalyptic number.

It is an amenable number.

1938445 is a deficient number, since it is larger than the sum of its proper divisors (427475).

1938445 is an equidigital number, since it uses as much as digits as its factorization.

1938445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6635.

The product of its digits is 17280, while the sum is 34.

The square root of 1938445 is about 1392.2805033469. The cubic root of 1938445 is about 124.6860387536.

The spelling of 1938445 in words is "one million, nine hundred thirty-eight thousand, four hundred forty-five".