1999854150 has 144 divisors (see below), whose sum is σ = 5798445840. Its totient is φ = 454809600.

The previous prime is 1999854133. The next prime is 1999854151. The reversal of 1999854150 is 514589991.

It is a junction number, because it is equal to n+sod(n) for n = 1999854093 and 1999854102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999854151) by changing a digit.

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 71 ways as a sum of consecutive naturals, for example, 1770786 + ... + 1771914.

It is an arithmetic number, because the mean of its divisors is an integer number (40266985).

Almost surely, 2^1999854150 is an apocalyptic number.

1999854150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1999854150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2899222920).

1999854150 is an abundant number, since it is smaller than the sum of its proper divisors (3798591690).

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

1999854150 is a wasteful number, since it uses less digits than its factorization.

1999854150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399 (or 1387 counting only the distinct ones).

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

The square root of 1999854150 is about 44719.7288676933. The cubic root of 1999854150 is about 1259.8904225695.

The spelling of 1999854150 in words is "one billion, nine hundred ninety-nine million, eight hundred fifty-four thousand, one hundred fifty".