545890 has 16 divisors (see below), whose sum is σ = 996480. Its totient is φ = 215280.

The previous prime is 545873. The next prime is 545893. The reversal of 545890 is 98545.

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (545893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 445 + ... + 1135.

It is an arithmetic number, because the mean of its divisors is an integer number (62280).

2⁵⁴⁵⁸⁹⁰ is an apocalyptic number.

545890 is a deficient number, since it is larger than the sum of its proper divisors (450590).

545890 is a wasteful number, since it uses less digits than its factorization.

545890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 545890 is about 738.8436911824. The cubic root of 545890 is about 81.7275311005.

The spelling of 545890 in words is "five hundred forty-five thousand, eight hundred ninety".