1945404 has 24 divisors (see below), whose sum is σ = 5043920. Its totient is φ = 648432.

The previous prime is 1945403. The next prime is 1945439. The reversal of 1945404 is 4045491.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1945403) 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, 8899 + ... + 9114.

2^1945404 is an apocalyptic number.

It is an amenable number.

1945404 is an abundant number, since it is smaller than the sum of its proper divisors (3098516).

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

1945404 is a wasteful number, since it uses less digits than its factorization.

1945404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18026 (or 18018 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1945404 is about 1394.7774015950. Note that the first 3 decimals coincide. The cubic root of 1945404 is about 124.8350678080.

The spelling of 1945404 in words is "one million, nine hundred forty-five thousand, four hundred four".