673545600 has 576 divisors, whose sum is σ = 2969497440. Its totient is φ = 141557760.

The previous prime is 673545589. The next prime is 673545601. The reversal of 673545600 is 6545376.

673545600 is a `hidden beast` number, since 6 + 7 + 3 + 5 + 45 + 600 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673545601) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2620672 + ... + 2620928.

Almost surely, 2^673545600 is an apocalyptic number.

673545600 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 673545600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1484748720).

673545600 is an abundant number, since it is smaller than the sum of its proper divisors (2295951840).

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

673545600 is a wasteful number, since it uses less digits than its factorization.

673545600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 36.

The square root of 673545600 is about 25952.7570789695. The cubic root of 673545600 is about 876.5748400657.

The spelling of 673545600 in words is "six hundred seventy-three million, five hundred forty-five thousand, six hundred".