1644432034 has 16 divisors (see below), whose sum is σ = 2820332736. Its totient is φ = 704430000.

The previous prime is 1644432029. The next prime is 1644432047. The reversal of 1644432034 is 4302344461.

It is a junction number, because it is equal to n+sod(n) for n = 1644431987 and 1644432005.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5424 + ... + 57604.

It is an arithmetic number, because the mean of its divisors is an integer number (176270796).

Almost surely, 2^1644432034 is an apocalyptic number.

1644432034 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1644432034 is a deficient number, since it is larger than the sum of its proper divisors (1175900702).

1644432034 is a wasteful number, since it uses less digits than its factorization.

1644432034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54441.

The product of its (nonzero) digits is 27648, while the sum is 31.

The square root of 1644432034 is about 40551.5971818620. The cubic root of 1644432034 is about 1180.3350657211.

Adding to 1644432034 its reverse (4302344461), we get a palindrome (5946776495).

The spelling of 1644432034 in words is "one billion, six hundred forty-four million, four hundred thirty-two thousand, thirty-four".