1912183640 has 16 divisors (see below), whose sum is σ = 4302413280. Its totient is φ = 764873440.

The previous prime is 1912183639. The next prime is 1912183667. The reversal of 1912183640 is 463812191.

It is a self number, because there is not a number n which added to its sum of digits gives 1912183640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23902256 + ... + 23902335.

It is an arithmetic number, because the mean of its divisors is an integer number (268900830).

Almost surely, 2^1912183640 is an apocalyptic number.

1912183640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1912183640 is an abundant number, since it is smaller than the sum of its proper divisors (2390229640).

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

1912183640 is a wasteful number, since it uses less digits than its factorization.

1912183640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47804602 (or 47804598 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 1912183640 is about 43728.5220422552. The cubic root of 1912183640 is about 1241.2040940081.

The spelling of 1912183640 in words is "one billion, nine hundred twelve million, one hundred eighty-three thousand, six hundred forty".