19040404 has 6 divisors (see below), whose sum is σ = 33320714. Its totient is φ = 9520200.

The previous prime is 19040401. The next prime is 19040407. The reversal of 19040404 is 40404091.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (19040401) and next prime (19040407).

It can be written as a sum of positive squares in only one way, i.e., 14837904 + 4202500 = 3852^2 + 2050^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19040401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2380047 + ... + 2380054.

Almost surely, 2^19040404 is an apocalyptic number.

It is an amenable number.

19040404 is a deficient number, since it is larger than the sum of its proper divisors (14280310).

19040404 is a wasteful number, since it uses less digits than its factorization.

19040404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4760105 (or 4760103 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 19040404 is about 4363.5311388828. The cubic root of 19040404 is about 267.0291784989.

Adding to 19040404 its reverse (40404091), we get a palindrome (59444495).

The spelling of 19040404 in words is "nineteen million, forty thousand, four hundred four".