545217840 has 60 divisors (see below), whose sum is σ = 1831025664. Its totient is φ = 145391232.

The previous prime is 545217833. The next prime is 545217847. The reversal of 545217840 is 48712545.

545217840 is a `hidden beast` number, since 54 + 521 + 7 + 84 + 0 = 666.

545217840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (545217833) and next prime (545217847).

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 545217795 and 545217804.

It is not an unprimeable number, because it can be changed into a prime (545217847) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 377904 + ... + 379343.

Almost surely, 2^545217840 is an apocalyptic number.

It is an amenable number.

545217840 is an abundant number, since it is smaller than the sum of its proper divisors (1285807824).

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

545217840 is a wasteful number, since it uses less digits than its factorization.

545217840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757266 (or 757257 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 36.

The square root of 545217840 is about 23349.9002139195. The cubic root of 545217840 is about 816.9397333879.

The spelling of 545217840 in words is "five hundred forty-five million, two hundred seventeen thousand, eight hundred forty".