1988020736 has 40 divisors (see below), whose sum is σ = 4277723604. Its totient is φ = 917544960.

The previous prime is 1988020721. The next prime is 1988020739. The reversal of 1988020736 is 6370208891.

It can be written as a sum of positive squares in 2 ways, for example, as 1859334400 + 128686336 = 43120^2 + 11344^2 .

It is a super-3 number, since 3×1988020736³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1988020739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142685 + ... + 155996.

Almost surely, 2^1988020736 is an apocalyptic number.

1988020736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1988020736 is an abundant number, since it is smaller than the sum of its proper divisors (2289702868).

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

1988020736 is an equidigital number, since it uses as much as digits as its factorization.

1988020736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298712 (or 298696 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 1988020736 is about 44587.2261527895. The cubic root of 1988020736 is about 1257.4005230211.

The spelling of 1988020736 in words is "one billion, nine hundred eighty-eight million, twenty thousand, seven hundred thirty-six".