1985888613 has 12 divisors (see below), whose sum is σ = 2733857664. Its totient is φ = 1280941200.

The previous prime is 1985888579. The next prime is 1985888617. The reversal of 1985888613 is 3168885891.

It is a happy number.

It is not a de Polignac number, because 1985888613 - 2¹² = 1985884517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985888617) 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, 427443 + ... + 432063.

It is an arithmetic number, because the mean of its divisors is an integer number (227821472).

Almost surely, 2^1985888613 is an apocalyptic number.

It is an amenable number.

1985888613 is a deficient number, since it is larger than the sum of its proper divisors (747969051).

1985888613 is an frugal number, since it uses more digits than its factorization.

1985888613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9276 (or 4655 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 57.

The square root of 1985888613 is about 44563.3101665484. The cubic root of 1985888613 is about 1256.9508477036.

The spelling of 1985888613 in words is "one billion, nine hundred eighty-five million, eight hundred eighty-eight thousand, six hundred thirteen".