1988851280 has 40 divisors (see below), whose sum is σ = 4979780232. Its totient is φ = 734344704.

The previous prime is 1988851243. The next prime is 1988851289. The reversal of 1988851280 is 821588891.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 80209936 + 1908641344 = 8956^2 + 43688^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1988851289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 955139 + ... + 957218.

Almost surely, 2^1988851280 is an apocalyptic number.

1988851280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1988851280 is an abundant number, since it is smaller than the sum of its proper divisors (2990928952).

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

1988851280 is a wasteful number, since it uses less digits than its factorization.

1988851280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912383 (or 1912377 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 50.

The square root of 1988851280 is about 44596.5388791552. The cubic root of 1988851280 is about 1257.5756018560.

The spelling of 1988851280 in words is "one billion, nine hundred eighty-eight million, eight hundred fifty-one thousand, two hundred eighty".