1916978412 has 48 divisors (see below), whose sum is σ = 4825451232. Its totient is φ = 590054400.

The previous prime is 1916978383. The next prime is 1916978431. The reversal of 1916978412 is 2148796191.

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, 77839 + ... + 99462.

It is an arithmetic number, because the mean of its divisors is an integer number (100530234).

Almost surely, 2^1916978412 is an apocalyptic number.

1916978412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1916978412 is an abundant number, since it is smaller than the sum of its proper divisors (2908472820).

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

1916978412 is a wasteful number, since it uses less digits than its factorization.

1916978412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177378 (or 177376 counting only the distinct ones).

The product of its digits is 217728, while the sum is 48.

The square root of 1916978412 is about 43783.3120263874. The cubic root of 1916978412 is about 1242.2406616913.

The spelling of 1916978412 in words is "one billion, nine hundred sixteen million, nine hundred seventy-eight thousand, four hundred twelve".