645484000 has 96 divisors (see below), whose sum is σ = 1812597696. Its totient is φ = 221299200.

The previous prime is 645483973. The next prime is 645484003. The reversal of 645484000 is 484546.

645484000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645484003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16474 + ... + 39526.

It is an arithmetic number, because the mean of its divisors is an integer number (18881226).

Almost surely, 2^645484000 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 645484000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (906298848).

645484000 is an abundant number, since it is smaller than the sum of its proper divisors (1167113696).

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

645484000 is a wasteful number, since it uses less digits than its factorization.

645484000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23085 (or 23067 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 645484000 is about 25406.3771522033. The cubic root of 645484000 is about 864.2283204315.

The spelling of 645484000 in words is "six hundred forty-five million, four hundred eighty-four thousand".