545390640 has 60 divisors (see below), whose sum is σ = 1831605984. Its totient is φ = 145437312.

The previous prime is 545390639. The next prime is 545390669. The reversal of 545390640 is 46093545.

It is a happy number.

545390640 is a `hidden beast` number, since 5 + 4 + 5 + 3 + 9 + 0 + 640 = 666.

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 = 545390595 and 545390604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 378024 + ... + 379463.

Almost surely, 2^545390640 is an apocalyptic number.

It is an amenable number.

545390640 is an abundant number, since it is smaller than the sum of its proper divisors (1286215344).

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

545390640 is a wasteful number, since it uses less digits than its factorization.

545390640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757506 (or 757497 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 545390640 is about 23353.6001507262. The cubic root of 545390640 is about 817.0260305609.

The spelling of 545390640 in words is "five hundred forty-five million, three hundred ninety thousand, six hundred forty".