545785820 has 24 divisors (see below), whose sum is σ = 1157502528. Its totient is φ = 216152000.

The previous prime is 545785817. The next prime is 545785831. The reversal of 545785820 is 28587545.

It is a super-2 number, since 2×545785820² = 595764322626144800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 133076 + ... + 137115.

It is an arithmetic number, because the mean of its divisors is an integer number (48229272).

Almost surely, 2^545785820 is an apocalyptic number.

It is an amenable number.

545785820 is an abundant number, since it is smaller than the sum of its proper divisors (611716708).

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

545785820 is a wasteful number, since it uses less digits than its factorization.

545785820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270301 (or 270299 counting only the distinct ones).

The product of its (nonzero) digits is 448000, while the sum is 44.

The square root of 545785820 is about 23362.0594126460. The cubic root of 545785820 is about 817.2233169168.

The spelling of 545785820 in words is "five hundred forty-five million, seven hundred eighty-five thousand, eight hundred twenty".