1642727444 has 12 divisors (see below), whose sum is σ = 2875070100. Its totient is φ = 821278848.

The previous prime is 1642727423. The next prime is 1642727447. The reversal of 1642727444 is 4447272461.

It can be written as a sum of positive squares in 2 ways, for example, as 700237444 + 942490000 = 26462^2 + 30700^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642727447) 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 3 ways as a sum of consecutive naturals, for example, 45962 + ... + 73470.

It is an arithmetic number, because the mean of its divisors is an integer number (239589175).

Almost surely, 2^1642727444 is an apocalyptic number.

It is an amenable number.

1642727444 is a deficient number, since it is larger than the sum of its proper divisors (1232342656).

1642727444 is a wasteful number, since it uses less digits than its factorization.

1642727444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42442 (or 42440 counting only the distinct ones).

The product of its digits is 301056, while the sum is 41.

The square root of 1642727444 is about 40530.5741878893. The cubic root of 1642727444 is about 1179.9270863689.

The spelling of 1642727444 in words is "one billion, six hundred forty-two million, seven hundred twenty-seven thousand, four hundred forty-four".