1946985638 has 16 divisors (see below), whose sum is σ = 3168093600. Its totient is φ = 892047936.

The previous prime is 1946985637. The next prime is 1946985683. The reversal of 1946985638 is 8365896491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1946985631) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 269738 + ... + 276861.

It is an arithmetic number, because the mean of its divisors is an integer number (198005850).

Almost surely, 2^1946985638 is an apocalyptic number.

1946985638 is a deficient number, since it is larger than the sum of its proper divisors (1221107962).

1946985638 is a wasteful number, since it uses less digits than its factorization.

1946985638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546751.

The product of its digits is 11197440, while the sum is 59.

The square root of 1946985638 is about 44124.6602026577. The cubic root of 1946985638 is about 1248.6888947232.

The spelling of 1946985638 in words is "one billion, nine hundred forty-six million, nine hundred eighty-five thousand, six hundred thirty-eight".