545778 has 24 divisors (see below), whose sum is σ = 1227408. Its totient is φ = 181764.

The previous prime is 545773. The next prime is 545789. The reversal of 545778 is 877545.

545778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (545773) by changing a digit.

545778 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76 + ... + 1047.

It is an arithmetic number, because the mean of its divisors is an integer number (51142).

2⁵⁴⁵⁷⁷⁸ is an apocalyptic number.

545778 is an abundant number, since it is smaller than the sum of its proper divisors (681630).

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

545778 is a wasteful number, since it uses less digits than its factorization.

545778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140 (or 1128 counting only the distinct ones).

The product of its digits is 39200, while the sum is 36.

The square root of 545778 is about 738.7678931843. The cubic root of 545778 is about 81.7219413849.

It can be divided in two parts, 54 and 5778, that added together give a cube (5832 = 18³).

The spelling of 545778 in words is "five hundred forty-five thousand, seven hundred seventy-eight".