1999935220 has 24 divisors (see below), whose sum is σ = 4225019904. Its totient is φ = 795182496.

The previous prime is 1999935191. The next prime is 1999935227. The reversal of 1999935220 is 225399991.

It is a happy number.

1999935220 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999935227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 296052 + ... + 302731.

It is an arithmetic number, because the mean of its divisors is an integer number (176042496).

Almost surely, 2^1999935220 is an apocalyptic number.

1999935220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1999935220 is an abundant number, since it is smaller than the sum of its proper divisors (2225084684).

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

1999935220 is a wasteful number, since it uses less digits than its factorization.

1999935220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598959 (or 598957 counting only the distinct ones).

The product of its (nonzero) digits is 393660, while the sum is 49.

The square root of 1999935220 is about 44720.6352817131. The cubic root of 1999935220 is about 1259.9074468004.

The spelling of 1999935220 in words is "one billion, nine hundred ninety-nine million, nine hundred thirty-five thousand, two hundred twenty".