1644226434 has 24 divisors (see below), whose sum is σ = 3772049580. Its totient is φ = 515835648.

The previous prime is 1644226433. The next prime is 1644226459. The reversal of 1644226434 is 4346224461.

1644226434 is a `hidden beast` number, since 1 + 6 + 4 + 4 + 2 + 2 + 643 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1544725809 + 99500625 = 39303^2 + 9975^2 .

It is a super-3 number, since 3×1644226434³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1644226433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2686339 + ... + 2686950.

Almost surely, 2^1644226434 is an apocalyptic number.

1644226434 is an abundant number, since it is smaller than the sum of its proper divisors (2127823146).

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

1644226434 is a wasteful number, since it uses less digits than its factorization.

1644226434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5373314 (or 5373311 counting only the distinct ones).

The product of its digits is 110592, while the sum is 36.

The square root of 1644226434 is about 40549.0620606692. The cubic root of 1644226434 is about 1180.2858720382.

The spelling of 1644226434 in words is "one billion, six hundred forty-four million, two hundred twenty-six thousand, four hundred thirty-four".