390549 has 4 divisors (see below), whose sum is σ = 520736. Its totient is φ = 260364.

The previous prime is 390539. The next prime is 390553. The reversal of 390549 is 945093.

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 390549 - 2⁷ = 390421 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65089 + ... + 65094.

It is an arithmetic number, because the mean of its divisors is an integer number (130184).

2³⁹⁰⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

390549 is a deficient number, since it is larger than the sum of its proper divisors (130187).

390549 is a wasteful number, since it uses less digits than its factorization.

390549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130186.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 390549 is about 624.9391970424. The cubic root of 390549 is about 73.0957023404.

It can be divided in two parts, 390 and 549, that added together give a palindrome (939).

The spelling of 390549 in words is "three hundred ninety thousand, five hundred forty-nine".