390000 has 100 divisors (see below), whose sum is σ = 1355816. Its totient is φ = 96000.

The previous prime is 389999. The next prime is 390001. The reversal of 390000 is 93.

It is an interprime number because it is at equal distance from previous prime (389999) and next prime (390001).

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a nialpdrome in base 5.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390001) 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 19 ways as a sum of consecutive naturals, for example, 29994 + ... + 30006.

2³⁹⁰⁰⁰⁰ is an apocalyptic number.

390000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a pronic number, being equal to 624×625.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 390000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (677908).

390000 is an abundant number, since it is smaller than the sum of its proper divisors (965816).

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

390000 is a wasteful number, since it uses less digits than its factorization.

390000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44 (or 23 counting only the distinct ones).

The product of its (nonzero) digits is 27, while the sum is 12.

The square root of 390000 is about 624.4997998398. The cubic root of 390000 is about 73.0614357406.

Adding to 390000 its reverse (93), we get a palindrome (390093).

The spelling of 390000 in words is "three hundred ninety thousand".