2159850 has 144 divisors (see below), whose sum is σ = 7124544. Its totient is φ = 422400.

The previous prime is 2159831. The next prime is 2159881. The reversal of 2159850 is 589512.

2159850 = 128² + 129² + ... + 204².

2159850 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 127042 + ... + 127058.

It is an arithmetic number, because the mean of its divisors is an integer number (49476).

2^2159850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2159850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3562272).

2159850 is an abundant number, since it is smaller than the sum of its proper divisors (4964694).

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

2159850 is a wasteful number, since it uses less digits than its factorization.

2159850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61 (or 45 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 2159850 is about 1469.6428137476. The cubic root of 2159850 is about 129.2630890622.

The spelling of 2159850 in words is "two million, one hundred fifty-nine thousand, eight hundred fifty".