1988230860 has 756 divisors, whose sum is σ = 8352321264. Its totient is φ = 395176320.

The previous prime is 1988230843. The next prime is 1988230873. The reversal of 1988230860 is 680328891.

It is a tau number, because it is divible by the number of its divisors (756).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 251 ways as a sum of consecutive naturals, for example, 86444809 + ... + 86444831.

It is an arithmetic number, because the mean of its divisors is an integer number (11048044).

Almost surely, 2^1988230860 is an apocalyptic number.

1988230860 is a gapful number since it is divisible by the number (10) 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 1988230860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4176160632).

1988230860 is an abundant number, since it is smaller than the sum of its proper divisors (6364090404).

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

1988230860 is a wasteful number, since it uses less digits than its factorization.

1988230860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86 (or 51 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 1988230860 is about 44589.5824156271. The cubic root of 1988230860 is about 1257.4448218078. Note that the first 3 decimals are identical.

The spelling of 1988230860 in words is "one billion, nine hundred eighty-eight million, two hundred thirty thousand, eight hundred sixty".