1988255808 has 560 divisors, whose sum is σ = 7806927744. Its totient is φ = 484392960.

The previous prime is 1988255771. The next prime is 1988255821. The reversal of 1988255808 is 8085528891.

It is a happy number.

1988255808 is a `hidden beast` number, since 1 + 9 + 8 + 82 + 558 + 0 + 8 = 666.

It is a super-3 number, since 3×1988255808³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 6785710 + ... + 6786002.

Almost surely, 2^1988255808 is an apocalyptic number.

1988255808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1988255808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3903463872).

1988255808 is an abundant number, since it is smaller than the sum of its proper divisors (5818671936).

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

1988255808 is a wasteful number, since it uses less digits than its factorization.

1988255808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352 (or 333 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 54.

The square root of 1988255808 is about 44589.8621661920. The cubic root of 1988255808 is about 1257.4500811907.

The spelling of 1988255808 in words is "one billion, nine hundred eighty-eight million, two hundred fifty-five thousand, eight hundred eight".