1999472850 has 240 divisors, whose sum is σ = 5957518248. Its totient is φ = 495452160.

The previous prime is 1999472807. The next prime is 1999472851. The reversal of 1999472850 is 582749991.

1999472850 is a `hidden beast` number, since 1 + 9 + 99 + 472 + 85 + 0 = 666.

1999472850 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 307055529 + 1692417321 = 17523^2 + 41139^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999472851) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 7779922 + ... + 7780178.

Almost surely, 2^1999472850 is an apocalyptic number.

1999472850 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 1999472850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2978759124).

1999472850 is an abundant number, since it is smaller than the sum of its proper divisors (3958045398).

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

1999472850 is a wasteful number, since it uses less digits than its factorization.

1999472850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411 (or 397 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The square root of 1999472850 is about 44715.4654454138. The cubic root of 1999472850 is about 1259.8103456044.

The spelling of 1999472850 in words is "one billion, nine hundred ninety-nine million, four hundred seventy-two thousand, eight hundred fifty".