645034230 has 96 divisors (see below), whose sum is σ = 1869285600. Its totient is φ = 153363456.

The previous prime is 645034193. The next prime is 645034231. The reversal of 645034230 is 32430546.

It is a junction number, because it is equal to n+sod(n) for n = 645034194 and 645034203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645034231) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17976 + ... + 40164.

It is an arithmetic number, because the mean of its divisors is an integer number (19471725).

Almost surely, 2^645034230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 645034230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (934642800).

645034230 is an abundant number, since it is smaller than the sum of its proper divisors (1224251370).

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

645034230 is a wasteful number, since it uses less digits than its factorization.

645034230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22238 (or 22235 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 645034230 is about 25397.5240919268. The cubic root of 645034230 is about 864.0275438107.

Adding to 645034230 its reverse (32430546), we get a palindrome (677464776).

The spelling of 645034230 in words is "six hundred forty-five million, thirty-four thousand, two hundred thirty".