545240640 has 336 divisors, whose sum is σ = 2055644352. Its totient is φ = 122056704.

The previous prime is 545240639. The next prime is 545240651. The reversal of 545240640 is 46042545.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 545240598 and 545240607.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3151594 + ... + 3151766.

Almost surely, 2^545240640 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 545240640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1027822176).

545240640 is an abundant number, since it is smaller than the sum of its proper divisors (1510403712).

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

545240640 is a wasteful number, since it uses less digits than its factorization.

545240640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 545240640 is about 23350.3884336000. The cubic root of 545240640 is about 816.9511208645.

The spelling of 545240640 in words is "five hundred forty-five million, two hundred forty thousand, six hundred forty".