1918748412 has 336 divisors, whose sum is σ = 6193270272. Its totient is φ = 508083840.

The previous prime is 1918748411. The next prime is 1918748437. The reversal of 1918748412 is 2148478191.

1918748412 is a `hidden beast` number, since 1 + 91 + 87 + 484 + 1 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918748411) 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 111 ways as a sum of consecutive naturals, for example, 28638003 + ... + 28638069.

It is an arithmetic number, because the mean of its divisors is an integer number (18432352).

Almost surely, 2^1918748412 is an apocalyptic number.

1918748412 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 1918748412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3096635136).

1918748412 is an abundant number, since it is smaller than the sum of its proper divisors (4274521860).

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

1918748412 is a wasteful number, since it uses less digits than its factorization.

1918748412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180 (or 163 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 1918748412 is about 43803.5205434449. The cubic root of 1918748412 is about 1242.6228759748.

The spelling of 1918748412 in words is "one billion, nine hundred eighteen million, seven hundred forty-eight thousand, four hundred twelve".