1985854646 has 8 divisors (see below), whose sum is σ = 2979900264. Its totient is φ = 992554560.

The previous prime is 1985854621. The next prime is 1985854649. The reversal of 1985854646 is 6464585891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1985854591 and 1985854600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985854649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179675 + ... + 190406.

It is an arithmetic number, because the mean of its divisors is an integer number (372487533).

Almost surely, 2^1985854646 is an apocalyptic number.

1985854646 is a deficient number, since it is larger than the sum of its proper divisors (994045618).

1985854646 is a wasteful number, since it uses less digits than its factorization.

1985854646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372766.

The product of its digits is 8294400, while the sum is 56.

The square root of 1985854646 is about 44562.9290554380. The cubic root of 1985854646 is about 1256.9436812908.

The spelling of 1985854646 in words is "one billion, nine hundred eighty-five million, eight hundred fifty-four thousand, six hundred forty-six".