1999419600 has 120 divisors (see below), whose sum is σ = 6433195392. Its totient is φ = 530816000.

The previous prime is 1999419563. The next prime is 1999419629. The reversal of 1999419600 is 69149991.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1999419600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 276025 + ... + 283175.

Almost surely, 2^1999419600 is an apocalyptic number.

1999419600 is a gapful number since it is divisible by the number (10) 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 1999419600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3216597696).

1999419600 is an abundant number, since it is smaller than the sum of its proper divisors (4433775792).

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

1999419600 is a wasteful number, since it uses less digits than its factorization.

1999419600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7405 (or 7394 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 48.

The square root of 1999419600 is about 44714.8700098748. The cubic root of 1999419600 is about 1259.7991617406.

The spelling of 1999419600 in words is "one billion, nine hundred ninety-nine million, four hundred nineteen thousand, six hundred".