850171420 has 48 divisors (see below), whose sum is σ = 2048437440. Its totient is φ = 290340864.

The previous prime is 850171409. The next prime is 850171451. The reversal of 850171420 is 24171058.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24166 + ... + 47794.

It is an arithmetic number, because the mean of its divisors is an integer number (42675780).

Almost surely, 2^850171420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 850171420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1024218720).

850171420 is an abundant number, since it is smaller than the sum of its proper divisors (1198266020).

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

850171420 is a wasteful number, since it uses less digits than its factorization.

850171420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23902 (or 23900 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 850171420 is about 29157.6991547687. The cubic root of 850171420 is about 947.3319116199.

The spelling of 850171420 in words is "eight hundred fifty million, one hundred seventy-one thousand, four hundred twenty".