545281920 has 192 divisors, whose sum is σ = 1899415440. Its totient is φ = 144138240.

The previous prime is 545281901. The next prime is 545281939. The reversal of 545281920 is 29182545.

545281920 is a `hidden beast` number, since 545 + 28 + 1 + 92 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (545281901) and next prime (545281939).

It is a tau number, because it is divible by the number of its divisors (192).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 788775 + ... + 789465.

Almost surely, 2^545281920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 545281920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (949707720).

545281920 is an abundant number, since it is smaller than the sum of its proper divisors (1354133520).

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

545281920 is a wasteful number, since it uses less digits than its factorization.

545281920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853 (or 838 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 545281920 is about 23351.2723422087. The cubic root of 545281920 is about 816.9717373830.

The spelling of 545281920 in words is "five hundred forty-five million, two hundred eighty-one thousand, nine hundred twenty".