1985188488 has 16 divisors (see below), whose sum is σ = 4962971280. Its totient is φ = 661729488.

The previous prime is 1985188483. The next prime is 1985188501. The reversal of 1985188488 is 8848815891.

It is a super-2 number, since 2×1985188488² = 7881946665775452288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1985188483) 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, 41358070 + ... + 41358117.

It is an arithmetic number, because the mean of its divisors is an integer number (310185705).

Almost surely, 2^1985188488 is an apocalyptic number.

It is an amenable number.

1985188488 is an abundant number, since it is smaller than the sum of its proper divisors (2977782792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1985188488 is a wasteful number, since it uses less digits than its factorization.

1985188488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82716196 (or 82716192 counting only the distinct ones).

The product of its digits is 5898240, while the sum is 60.

The square root of 1985188488 is about 44555.4540769141. The cubic root of 1985188488 is about 1256.8031176741.

The spelling of 1985188488 in words is "one billion, nine hundred eighty-five million, one hundred eighty-eight thousand, four hundred eighty-eight".