Search a number
BaseRepresentation
bin1011111010101010101
3201211122102
41133111111
544443420
612211445
73214304
oct1372525
9654572
10390485
11247417
12169b85
13108974
14a243b
157aa75
hex5f555

390485 has 8 divisors (see below), whose sum is σ = 484920. Its totient is φ = 301504.

The previous prime is 390479. The next prime is 390487. The reversal of 390485 is 584093.

It can be written as a sum of positive squares in 4 ways, for example, as 31684 + 358801 = 178^2 + 599^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 390485 - 26 = 390421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1202 + ... + 1491.

It is an arithmetic number, because the mean of its divisors is an integer number (60615).

2390485 is an apocalyptic number.

It is an amenable number.

390485 is a deficient number, since it is larger than the sum of its proper divisors (94435).

390485 is a wasteful number, since it uses less digits than its factorization.

390485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2727.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 390485 is about 624.8879899630. The cubic root of 390485 is about 73.0917093455.

The spelling of 390485 in words is "three hundred ninety thousand, four hundred eighty-five".

Divisors: 1 5 29 145 2693 13465 78097 390485