1985594434 has 16 divisors (see below), whose sum is σ = 2987665920. Its totient is φ = 989712000.

The previous prime is 1985594419. The next prime is 1985594459. The reversal of 1985594434 is 4344955891.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1394647 + ... + 1396069.

It is an arithmetic number, because the mean of its divisors is an integer number (186729120).

Almost surely, 2^1985594434 is an apocalyptic number.

1985594434 is a deficient number, since it is larger than the sum of its proper divisors (1002071486).

1985594434 is a wasteful number, since it uses less digits than its factorization.

1985594434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3105.

The product of its digits is 3110400, while the sum is 52.

The square root of 1985594434 is about 44560.0093581678. The cubic root of 1985594434 is about 1256.8887786293. Note that the first 3 decimals are identical.

The spelling of 1985594434 in words is "one billion, nine hundred eighty-five million, five hundred ninety-four thousand, four hundred thirty-four".