1918988412 has 96 divisors (see below), whose sum is σ = 5063460864. Its totient is φ = 560390400.

The previous prime is 1918988411. The next prime is 1918988419. The reversal of 1918988412 is 2148898191.

It is a super-3 number, since 3×1918988412³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918988411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1132638 + ... + 1134330.

It is an arithmetic number, because the mean of its divisors is an integer number (52744384).

Almost surely, 2^1918988412 is an apocalyptic number.

1918988412 is a gapful number since it is divisible by the number (12) 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 1918988412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2531730432).

1918988412 is an abundant number, since it is smaller than the sum of its proper divisors (3144472452).

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

1918988412 is a wasteful number, since it uses less digits than its factorization.

1918988412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2019 (or 2017 counting only the distinct ones).

The product of its digits is 331776, while the sum is 51.

The square root of 1918988412 is about 43806.2599636171. The cubic root of 1918988412 is about 1242.6746835411.

The spelling of 1918988412 in words is "one billion, nine hundred eighteen million, nine hundred eighty-eight thousand, four hundred twelve".