1936440018 has 12 divisors (see below), whose sum is σ = 4195620078. Its totient is φ = 645480000.

The previous prime is 1936440007. The next prime is 1936440019. The reversal of 1936440018 is 8100446391.

1936440018 is a `hidden beast` number, since 1 + 9 + 3 + 644 + 0 + 0 + 1 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1655106489 + 281333529 = 40683^2 + 16773^2 .

It is not an unprimeable number, because it can be changed into a prime (1936440019) 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 5 ways as a sum of consecutive naturals, for example, 53789983 + ... + 53790018.

Almost surely, 2^1936440018 is an apocalyptic number.

1936440018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1936440018 is an abundant number, since it is smaller than the sum of its proper divisors (2259180060).

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

1936440018 is a wasteful number, since it uses less digits than its factorization.

1936440018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107580009 (or 107580006 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 1936440018 is about 44004.9999204636. Note that the first 4 decimals coincide. The cubic root of 1936440018 is about 1246.4303529731.

The spelling of 1936440018 in words is "one billion, nine hundred thirty-six million, four hundred forty thousand, eighteen".