852390 has 128 divisors (see below), whose sum is σ = 2903040. Its totient is φ = 172800.

The previous prime is 852367. The next prime is 852391. The reversal of 852390 is 93258.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (852391) by changing a digit.

852390 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20770 + ... + 20810.

It is an arithmetic number, because the mean of its divisors is an integer number (22680).

2⁸⁵²³⁹⁰ is an apocalyptic number.

852390 is the 462-nd decagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 852390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1451520).

852390 is an abundant number, since it is smaller than the sum of its proper divisors (2050650).

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

852390 is a wasteful number, since it uses less digits than its factorization.

852390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 852390 is about 923.2496953696. The cubic root of 852390 is about 94.8155238157.

The spelling of 852390 in words is "eight hundred fifty-two thousand, three hundred ninety".