1985445106 has 24 divisors (see below), whose sum is σ = 3058482240. Its totient is φ = 966636216.

The previous prime is 1985445097. The next prime is 1985445107. The reversal of 1985445106 is 6015445891.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (1985445107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1622811 + ... + 1624033.

It is an arithmetic number, because the mean of its divisors is an integer number (127436760).

Almost surely, 2^1985445106 is an apocalyptic number.

1985445106 is a deficient number, since it is larger than the sum of its proper divisors (1073037134).

1985445106 is a wasteful number, since it uses less digits than its factorization.

1985445106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750 (or 1707 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The square root of 1985445106 is about 44558.3337435322. Note that the first 3 decimals coincide. The cubic root of 1985445106 is about 1256.8572694433.

The spelling of 1985445106 in words is "one billion, nine hundred eighty-five million, four hundred forty-five thousand, one hundred six".