1919478804 has 12 divisors (see below), whose sum is σ = 4478783904. Its totient is φ = 639826264.

The previous prime is 1919478797. The next prime is 1919478817. The reversal of 1919478804 is 4088749191.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79978272 + ... + 79978295.

It is an arithmetic number, because the mean of its divisors is an integer number (373231992).

Almost surely, 2^1919478804 is an apocalyptic number.

It is an amenable number.

1919478804 is an abundant number, since it is smaller than the sum of its proper divisors (2559305100).

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

1919478804 is a wasteful number, since it uses less digits than its factorization.

1919478804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159956574 (or 159956572 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 51.

The square root of 1919478804 is about 43811.8568882900. The cubic root of 1919478804 is about 1242.7805285125.

The spelling of 1919478804 in words is "one billion, nine hundred nineteen million, four hundred seventy-eight thousand, eight hundred four".