1988720043 has 12 divisors (see below), whose sum is σ = 2663467128. Its totient is φ = 1319919360.

The previous prime is 1988720033. The next prime is 1988720053. The reversal of 1988720043 is 3400278891.

It is an interprime number because it is at equal distance from previous prime (1988720033) and next prime (1988720053).

It is not a de Polignac number, because 1988720043 - 2¹⁴ = 1988703659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1988719977 and 1988720004.

It is not an unprimeable number, because it can be changed into a prime (1988720003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 151003 + ... + 163643.

It is an arithmetic number, because the mean of its divisors is an integer number (221955594).

Almost surely, 2^1988720043 is an apocalyptic number.

1988720043 is a deficient number, since it is larger than the sum of its proper divisors (674747085).

1988720043 is an equidigital number, since it uses as much as digits as its factorization.

1988720043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13102 (or 12873 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 1988720043 is about 44595.0674738810. The cubic root of 1988720043 is about 1257.5479403140.

The spelling of 1988720043 in words is "one billion, nine hundred eighty-eight million, seven hundred twenty thousand, forty-three".