645224234 has 8 divisors (see below), whose sum is σ = 969219108. Its totient is φ = 322151200.

The previous prime is 645224227. The next prime is 645224263. The reversal of 645224234 is 432422546.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 552391009 + 92833225 = 23503^2 + 9635^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 645224234.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228707 + ... + 231510.

Almost surely, 2^645224234 is an apocalyptic number.

645224234 is a deficient number, since it is larger than the sum of its proper divisors (323994874).

645224234 is a wasteful number, since it uses less digits than its factorization.

645224234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460920.

The product of its digits is 46080, while the sum is 32.

The square root of 645224234 is about 25401.2644173474. The cubic root of 645224234 is about 864.1123726797.

The spelling of 645224234 in words is "six hundred forty-five million, two hundred twenty-four thousand, two hundred thirty-four".