645430026 has 8 divisors (see below), whose sum is σ = 1290860064. Its totient is φ = 215143340.

The previous prime is 645429997. The next prime is 645430031. The reversal of 645430026 is 620034546.

645430026 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

645430026 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 645429975 and 645430002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53785830 + ... + 53785841.

It is an arithmetic number, because the mean of its divisors is an integer number (161357508).

Almost surely, 2^645430026 is an apocalyptic number.

645430026 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

645430026 is a wasteful number, since it uses less digits than its factorization.

645430026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107571676.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 645430026 is about 25405.3149163713. The cubic root of 645430026 is about 864.2042314484.

The spelling of 645430026 in words is "six hundred forty-five million, four hundred thirty thousand, twenty-six".