1671859444 has 12 divisors (see below), whose sum is σ = 2926094500. Its totient is φ = 835832448.

The previous prime is 1671859429. The next prime is 1671859487. The reversal of 1671859444 is 4449581761.

It can be written as a sum of positive squares in 2 ways, for example, as 1103036944 + 568822500 = 33212^2 + 23850^2 .

It is a super-2 number, since 2×1671859444² = 5590228000983978272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25852 + ... + 63340.

Almost surely, 2^1671859444 is an apocalyptic number.

It is an amenable number.

1671859444 is a deficient number, since it is larger than the sum of its proper divisors (1254235056).

1671859444 is a wasteful number, since it uses less digits than its factorization.

1671859444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48642 (or 48640 counting only the distinct ones).

The product of its digits is 967680, while the sum is 49.

The square root of 1671859444 is about 40888.3778597293. The cubic root of 1671859444 is about 1186.8611685489.

The spelling of 1671859444 in words is "one billion, six hundred seventy-one million, eight hundred fifty-nine thousand, four hundred forty-four".