1988265885 has 16 divisors (see below), whose sum is σ = 3184085184. Its totient is φ = 1059455232.

The previous prime is 1988265883. The next prime is 1988265943. The reversal of 1988265885 is 5885628891.

It is not a de Polignac number, because 1988265885 - 2¹ = 1988265883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1988265883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42172 + ... + 75861.

It is an arithmetic number, because the mean of its divisors is an integer number (199005324).

Almost surely, 2^1988265885 is an apocalyptic number.

1988265885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1988265885 is a deficient number, since it is larger than the sum of its proper divisors (1195819299).

1988265885 is a wasteful number, since it uses less digits than its factorization.

1988265885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119164.

The product of its digits is 11059200, while the sum is 60.

The square root of 1988265885 is about 44589.9751625856. The cubic root of 1988265885 is about 1257.4522055490.

The spelling of 1988265885 in words is "one billion, nine hundred eighty-eight million, two hundred sixty-five thousand, eight hundred eighty-five".