645305024 has 112 divisors (see below), whose sum is σ = 1587398400. Its totient is φ = 253449216.

The previous prime is 645305009. The next prime is 645305039. The reversal of 645305024 is 420503546.

It is an interprime number because it is at equal distance from previous prime (645305009) and next prime (645305039).

It is a tau number, because it is divible by the number of its divisors (112).

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, 1042187 + ... + 1042805.

It is an arithmetic number, because the mean of its divisors is an integer number (14173200).

Almost surely, 2^645305024 is an apocalyptic number.

645305024 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 645305024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (793699200).

645305024 is an abundant number, since it is smaller than the sum of its proper divisors (942093376).

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

645305024 is a wasteful number, since it uses less digits than its factorization.

645305024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 645305024 is about 25402.8546427365. The cubic root of 645305024 is about 864.1484370025.

The spelling of 645305024 in words is "six hundred forty-five million, three hundred five thousand, twenty-four".