1912112640 has 240 divisors, whose sum is σ = 6804193968. Its totient is φ = 495894528.

The previous prime is 1912112627. The next prime is 1912112647. The reversal of 1912112640 is 462112191.

1912112640 is a `hidden beast` number, since 1 + 9 + 1 + 2 + 1 + 12 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1912112647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 851359 + ... + 853601.

Almost surely, 2^1912112640 is an apocalyptic number.

1912112640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1912112640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3402096984).

1912112640 is an abundant number, since it is smaller than the sum of its proper divisors (4892081328).

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

1912112640 is a wasteful number, since it uses less digits than its factorization.

1912112640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2309 (or 2290 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 1912112640 is about 43727.7102076018. The cubic root of 1912112640 is about 1241.1887317142.

The spelling of 1912112640 in words is "one billion, nine hundred twelve million, one hundred twelve thousand, six hundred forty".