1930817904 has 80 divisors (see below), whose sum is σ = 5116815360. Its totient is φ = 627101440.

The previous prime is 1930817899. The next prime is 1930817921. The reversal of 1930817904 is 4097180391.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 537394 + ... + 540974.

It is an arithmetic number, because the mean of its divisors is an integer number (63960192).

Almost surely, 2^1930817904 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 1930817904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2558407680).

1930817904 is an abundant number, since it is smaller than the sum of its proper divisors (3185997456).

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

1930817904 is a wasteful number, since it uses less digits than its factorization.

1930817904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3878 (or 3872 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 1930817904 is about 43941.0730865781. The cubic root of 1930817904 is about 1245.2229197131. Note that the first 3 decimals are identical.

The spelling of 1930817904 in words is "one billion, nine hundred thirty million, eight hundred seventeen thousand, nine hundred four".