1999158450 has 24 divisors (see below), whose sum is σ = 4957913328. Its totient is φ = 533108880.

The previous prime is 1999158443. The next prime is 1999158461. The reversal of 1999158450 is 548519991.

It is a junction number, because it is equal to n+sod(n) for n = 1999158393 and 1999158402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6663712 + ... + 6664011.

It is an arithmetic number, because the mean of its divisors is an integer number (206579722).

Almost surely, 2^1999158450 is an apocalyptic number.

1999158450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1999158450 is an abundant number, since it is smaller than the sum of its proper divisors (2958754878).

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

1999158450 is a wasteful number, since it uses less digits than its factorization.

1999158450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13327738 (or 13327733 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 51.

The square root of 1999158450 is about 44711.9497450066. The cubic root of 1999158450 is about 1259.7443106768.

The spelling of 1999158450 in words is "one billion, nine hundred ninety-nine million, one hundred fifty-eight thousand, four hundred fifty".