1912778608 has 40 divisors (see below), whose sum is σ = 4017583136. Its totient is φ = 876960000.

The previous prime is 1912778587. The next prime is 1912778611. The reversal of 1912778608 is 8068772191.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 958 + ... + 61858.

Almost surely, 2^1912778608 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 1912778608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2008791568).

1912778608 is an abundant number, since it is smaller than the sum of its proper divisors (2104804528).

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

1912778608 is a wasteful number, since it uses less digits than its factorization.

1912778608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61073 (or 61067 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 49.

The square root of 1912778608 is about 43735.3244871923. The cubic root of 1912778608 is about 1241.3328124924.

The spelling of 1912778608 in words is "one billion, nine hundred twelve million, seven hundred seventy-eight thousand, six hundred eight".