1999608620 has 12 divisors (see below), whose sum is σ = 4199178144. Its totient is φ = 799843440.

The previous prime is 1999608619. The next prime is 1999608623. The reversal of 1999608620 is 268069991.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1999608623) 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 3 ways as a sum of consecutive naturals, for example, 49990196 + ... + 49990235.

It is an arithmetic number, because the mean of its divisors is an integer number (349931512).

Almost surely, 2^1999608620 is an apocalyptic number.

1999608620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1999608620 is an abundant number, since it is smaller than the sum of its proper divisors (2199569524).

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

1999608620 is a wasteful number, since it uses less digits than its factorization.

1999608620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99980440 (or 99980438 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 50.

The square root of 1999608620 is about 44716.9835744765. The cubic root of 1999608620 is about 1259.8388598833.

The spelling of 1999608620 in words is "one billion, nine hundred ninety-nine million, six hundred eight thousand, six hundred twenty".