1939404 has 24 divisors (see below), whose sum is σ = 4682160. Its totient is φ = 624064.

The previous prime is 1939403. The next prime is 1939409. The reversal of 1939404 is 4049391.

It is a super-2 number, since 2×1939404² = 7522575750432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1939403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2439 + ... + 3134.

It is an arithmetic number, because the mean of its divisors is an integer number (195090).

2^1939404 is an apocalyptic number.

It is an amenable number.

1939404 is an abundant number, since it is smaller than the sum of its proper divisors (2742756).

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

1939404 is a wasteful number, since it uses less digits than its factorization.

1939404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5609 (or 5607 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 1939404 is about 1392.6248597523. The cubic root of 1939404 is about 124.7065971905.

The spelling of 1939404 in words is "one million, nine hundred thirty-nine thousand, four hundred four".