1918875340 has 96 divisors (see below), whose sum is σ = 4368821184. Its totient is φ = 705331200.

The previous prime is 1918875307. The next prime is 1918875347. The reversal of 1918875340 is 435788191.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1918875347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2736990 + ... + 2737690.

It is an arithmetic number, because the mean of its divisors is an integer number (45508554).

Almost surely, 2^1918875340 is an apocalyptic number.

1918875340 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 1918875340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2184410592).

1918875340 is an abundant number, since it is smaller than the sum of its proper divisors (2449945844).

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

1918875340 is a wasteful number, since it uses less digits than its factorization.

1918875340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907 (or 905 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 46.

The square root of 1918875340 is about 43804.9693528029. The cubic root of 1918875340 is about 1242.6502758079.

The spelling of 1918875340 in words is "one billion, nine hundred eighteen million, eight hundred seventy-five thousand, three hundred forty".