645035430 has 64 divisors (see below), whose sum is σ = 1712265408. Its totient is φ = 154483200.

The previous prime is 645035423. The next prime is 645035449. The reversal of 645035430 is 34530546.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7921 + ... + 36780.

It is an arithmetic number, because the mean of its divisors is an integer number (26754147).

Almost surely, 2^645035430 is an apocalyptic number.

645035430 is an abundant number, since it is smaller than the sum of its proper divisors (1067229978).

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

645035430 is a wasteful number, since it uses less digits than its factorization.

645035430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44761.

The product of its (nonzero) digits is 21600, while the sum is 30.

The square root of 645035430 is about 25397.5477162658. The cubic root of 645035430 is about 864.0280796130.

Adding to 645035430 its reverse (34530546), we get a palindrome (679565976).

The spelling of 645035430 in words is "six hundred forty-five million, thirty-five thousand, four hundred thirty".