645083298 has 32 divisors (see below), whose sum is σ = 1434366720. Its totient is φ = 214900560.

The previous prime is 645083281. The next prime is 645083317. The reversal of 645083298 is 892380546.

It is a super-2 number, since 2×645083298² = 832264922717113608, which contains 22 as substring.

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 148903 + ... + 153173.

It is an arithmetic number, because the mean of its divisors is an integer number (44823960).

Almost surely, 2^645083298 is an apocalyptic number.

645083298 is an abundant number, since it is smaller than the sum of its proper divisors (789283422).

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

645083298 is a wasteful number, since it uses less digits than its factorization.

645083298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7079 (or 7073 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 645083298 is about 25398.4900732307. The cubic root of 645083298 is about 864.0494522235.

The spelling of 645083298 in words is "six hundred forty-five million, eighty-three thousand, two hundred ninety-eight".