201390 has 48 divisors (see below), whose sum is σ = 566352. Its totient is φ = 45696.

The previous prime is 201389. The next prime is 201401. The reversal of 201390 is 93102.

201390 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 (15).

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1402 + ... + 1538.

It is an arithmetic number, because the mean of its divisors is an integer number (11799).

2²⁰¹³⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283176).

201390 is an abundant number, since it is smaller than the sum of its proper divisors (364962).

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

201390 is a wasteful number, since it uses less digits than its factorization.

201390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 201390 is about 448.7649718951. The cubic root of 201390 is about 58.6155215982.

Adding to 201390 its reverse (93102), we get a palindrome (294492).

The spelling of 201390 in words is "two hundred one thousand, three hundred ninety".