1912134840 has 768 divisors, whose sum is σ = 8084551680. Its totient is φ = 356106240.

The previous prime is 1912134821. The next prime is 1912134869. The reversal of 1912134840 is 484312191.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 40683697 + ... + 40683743.

It is an arithmetic number, because the mean of its divisors is an integer number (10526760).

Almost surely, 2^1912134840 is an apocalyptic number.

1912134840 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 1912134840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4042275840).

1912134840 is an abundant number, since it is smaller than the sum of its proper divisors (6172416840).

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

1912134840 is a wasteful number, since it uses less digits than its factorization.

1912134840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 1912134840 is about 43727.9640504792. The cubic root of 1912134840 is about 1241.1935351765.

The spelling of 1912134840 in words is "one billion, nine hundred twelve million, one hundred thirty-four thousand, eight hundred forty".