1639852044 has 12 divisors (see below), whose sum is σ = 3826321464. Its totient is φ = 546617344.

The previous prime is 1639852033. The next prime is 1639852061. The reversal of 1639852044 is 4402589361.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1639852044² = 5378229452421955872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1639851987 and 1639852005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68327157 + ... + 68327180.

It is an arithmetic number, because the mean of its divisors is an integer number (318860122).

Almost surely, 2^1639852044 is an apocalyptic number.

It is an amenable number.

1639852044 is an abundant number, since it is smaller than the sum of its proper divisors (2186469420).

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

1639852044 is a wasteful number, since it uses less digits than its factorization.

1639852044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136654344 (or 136654342 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 1639852044 is about 40495.0866649276. The cubic root of 1639852044 is about 1179.2382433867.

The spelling of 1639852044 in words is "one billion, six hundred thirty-nine million, eight hundred fifty-two thousand, forty-four".