1644031342 has 32 divisors (see below), whose sum is σ = 2661258240. Its totient is φ = 758862720.

The previous prime is 1644031273. The next prime is 1644031349. The reversal of 1644031342 is 2431304461.

It is a super-3 number, since 3×1644031342³ (a number of 29 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1644031342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1644031349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1658467 + ... + 1659457.

It is an arithmetic number, because the mean of its divisors is an integer number (83164320).

Almost surely, 2^1644031342 is an apocalyptic number.

1644031342 is a deficient number, since it is larger than the sum of its proper divisors (1017226898).

1644031342 is a wasteful number, since it uses less digits than its factorization.

1644031342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1896.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 1644031342 is about 40546.6563602968. The cubic root of 1644031342 is about 1180.2391888007.

The spelling of 1644031342 in words is "one billion, six hundred forty-four million, thirty-one thousand, three hundred forty-two".