1919620404 has 96 divisors (see below), whose sum is σ = 5368832000. Its totient is φ = 589638528.

The previous prime is 1919620387. The next prime is 1919620453. The reversal of 1919620404 is 4040269191.

It is a happy number.

1919620404 is a `hidden beast` number, since 19 + 19 + 620 + 4 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1500237 + ... + 1501515.

Almost surely, 2^1919620404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1919620404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2684416000).

1919620404 is an abundant number, since it is smaller than the sum of its proper divisors (3449211596).

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

1919620404 is a wasteful number, since it uses less digits than its factorization.

1919620404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2374 (or 2366 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 1919620404 is about 43813.4728593842. The cubic root of 1919620404 is about 1242.8110877447.

Adding to 1919620404 its reverse (4040269191), we get a palindrome (5959889595).

The spelling of 1919620404 in words is "one billion, nine hundred nineteen million, six hundred twenty thousand, four hundred four".