1938940 has 24 divisors (see below), whose sum is σ = 4213440. Its totient is φ = 748608.

The previous prime is 1938907. The next prime is 1938949. The reversal of 1938940 is 498391.

It is a junction number, because it is equal to n+sod(n) for n = 1938896 and 1938905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1938949) 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, 1092 + ... + 2251.

It is an arithmetic number, because the mean of its divisors is an integer number (175560).

2^1938940 is an apocalyptic number.

1938940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1938940 is an abundant number, since it is smaller than the sum of its proper divisors (2274500).

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

1938940 is a wasteful number, since it uses less digits than its factorization.

1938940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3381 (or 3379 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 1938940 is about 1392.4582579022. The cubic root of 1938940 is about 124.6966510977.

The spelling of 1938940 in words is "one million, nine hundred thirty-eight thousand, nine hundred forty".