1985886447 has 32 divisors (see below), whose sum is σ = 2864678400. Its totient is φ = 1219946112.

The previous prime is 1985886407. The next prime is 1985886451. The reversal of 1985886447 is 7446885891.

It is not a de Polignac number, because 1985886447 - 2⁸ = 1985886191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985886407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1225804 + ... + 1227422.

It is an arithmetic number, because the mean of its divisors is an integer number (89521200).

Almost surely, 2^1985886447 is an apocalyptic number.

1985886447 is a deficient number, since it is larger than the sum of its proper divisors (878791953).

1985886447 is a wasteful number, since it uses less digits than its factorization.

1985886447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2287.

The product of its digits is 15482880, while the sum is 60.

The square root of 1985886447 is about 44563.2858640383. The cubic root of 1985886447 is about 1256.9503907198.

The spelling of 1985886447 in words is "one billion, nine hundred eighty-five million, eight hundred eighty-six thousand, four hundred forty-seven".