1988201880 has 192 divisors, whose sum is σ = 7706050560. Its totient is φ = 434674944.

The previous prime is 1988201869. The next prime is 1988201899. The reversal of 1988201880 is 881028891.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40809 + ... + 75111.

It is an arithmetic number, because the mean of its divisors is an integer number (40135680).

Almost surely, 2^1988201880 is an apocalyptic number.

1988201880 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 1988201880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3853025280).

1988201880 is an abundant number, since it is smaller than the sum of its proper divisors (5717848680).

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

1988201880 is a wasteful number, since it uses less digits than its factorization.

1988201880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34350 (or 34343 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 45.

The square root of 1988201880 is about 44589.2574506461. The cubic root of 1988201880 is about 1257.4387123683.

The spelling of 1988201880 in words is "one billion, nine hundred eighty-eight million, two hundred one thousand, eight hundred eighty".