390187 has 6 divisors (see below), whose sum is σ = 453948. Its totient is φ = 334404.

The previous prime is 390161. The next prime is 390191. The reversal of 390187 is 781093.

It is a de Polignac number, because none of the positive numbers 2^k-390187 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (390107) 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 5 ways as a sum of consecutive naturals, for example, 3933 + ... + 4030.

It is an arithmetic number, because the mean of its divisors is an integer number (75658).

2³⁹⁰¹⁸⁷ is an apocalyptic number.

390187 is a deficient number, since it is larger than the sum of its proper divisors (63761).

390187 is an equidigital number, since it uses as much as digits as its factorization.

390187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7977 (or 7970 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 390187 is about 624.6495017208. The cubic root of 390187 is about 73.0731112153.

The spelling of 390187 in words is "three hundred ninety thousand, one hundred eighty-seven".