645054288 has 40 divisors (see below), whose sum is σ = 1667304000. Its totient is φ = 214900224.

The previous prime is 645054287. The next prime is 645054301. The reversal of 645054288 is 882450546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645054281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157288 + ... + 161336.

It is an arithmetic number, because the mean of its divisors is an integer number (41682600).

Almost surely, 2^645054288 is an apocalyptic number.

It is an amenable number.

645054288 is an abundant number, since it is smaller than the sum of its proper divisors (1022249712).

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

645054288 is a wasteful number, since it uses less digits than its factorization.

645054288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7379 (or 7373 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 42.

The square root of 645054288 is about 25397.9189698684. The cubic root of 645054288 is about 864.0364996583.

The spelling of 645054288 in words is "six hundred forty-five million, fifty-four thousand, two hundred eighty-eight".