1938220 has 12 divisors (see below), whose sum is σ = 4070304. Its totient is φ = 775280.

The previous prime is 1938217. The next prime is 1938227. The reversal of 1938220 is 228391.

It is not an unprimeable number, because it can be changed into a prime (1938227) 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 3 ways as a sum of consecutive naturals, for example, 48436 + ... + 48475.

It is an arithmetic number, because the mean of its divisors is an integer number (339192).

2^1938220 is an apocalyptic number.

1938220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1938220 is an abundant number, since it is smaller than the sum of its proper divisors (2132084).

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

1938220 is a wasteful number, since it uses less digits than its factorization.

1938220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96920 (or 96918 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1938220 is about 1392.1996983192. The cubic root of 1938220 is about 124.6812143635.

It can be divided in two parts, 19382 and 20, that multiplied together give a triangular number (387640 = T₈₈₀).

The spelling of 1938220 in words is "one million, nine hundred thirty-eight thousand, two hundred twenty".