390801 has 4 divisors (see below), whose sum is σ = 521072. Its totient is φ = 260532.

The previous prime is 390791. The next prime is 390809. The reversal of 390801 is 108093.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 390801 - 2⁶ = 390737 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390809) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 65131 + ... + 65136.

It is an arithmetic number, because the mean of its divisors is an integer number (130268).

2³⁹⁰⁸⁰¹ is an apocalyptic number.

It is an amenable number.

390801 is a deficient number, since it is larger than the sum of its proper divisors (130271).

390801 is a wasteful number, since it uses less digits than its factorization.

390801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130270.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 390801 is about 625.1407841439. The cubic root of 390801 is about 73.1114205188. Note that the first 3 decimals are identical.

Adding to 390801 its reverse (108093), we get a palindrome (498894).

The spelling of 390801 in words is "three hundred ninety thousand, eight hundred one".