431445645 has 12 divisors (see below), whose sum is σ = 747839196. Its totient is φ = 230104320.

The previous prime is 431445613. The next prime is 431445683. The reversal of 431445645 is 546544134.

431445645 is a `hidden beast` number, since 4 + 3 + 1 + 4 + 4 + 5 + 645 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 235837449 + 195608196 = 15357^2 + 13986^2 .

It is not a de Polignac number, because 431445645 - 2⁵ = 431445613 is a prime.

It is a super-3 number, since 3×431445645³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4793796 + ... + 4793885.

It is an arithmetic number, because the mean of its divisors is an integer number (62319933).

Almost surely, 2^431445645 is an apocalyptic number.

431445645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

431445645 is a deficient number, since it is larger than the sum of its proper divisors (316393551).

431445645 is a wasteful number, since it uses less digits than its factorization.

431445645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9587692 (or 9587689 counting only the distinct ones).

The product of its digits is 115200, while the sum is 36.

The square root of 431445645 is about 20771.2697012003. The cubic root of 431445645 is about 755.6291380382.

Adding to 431445645 its reverse (546544134), we get a palindrome (977989779).

The spelling of 431445645 in words is "four hundred thirty-one million, four hundred forty-five thousand, six hundred forty-five".