645283072 has 36 divisors (see below), whose sum is σ = 1472056096. Its totient is φ = 276549120.

The previous prime is 645283057. The next prime is 645283117. The reversal of 645283072 is 270382546.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178254 + ... + 181837.

Almost surely, 2^645283072 is an apocalyptic number.

It is an amenable number.

645283072 is an abundant number, since it is smaller than the sum of its proper divisors (826773024).

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

645283072 is an equidigital number, since it uses as much as digits as its factorization.

645283072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360114 (or 360100 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 645283072 is about 25402.4225616377. The cubic root of 645283072 is about 864.1386380181.

It can be divided in two parts, 64528 and 3072, that added together give a square (67600 = 260²).

The spelling of 645283072 in words is "six hundred forty-five million, two hundred eighty-three thousand, seventy-two".