1988355429 has 6 divisors (see below), whose sum is σ = 2872068966. Its totient is φ = 1325570280.

The previous prime is 1988355419. The next prime is 1988355431. The reversal of 1988355429 is 9245538891.

1988355429 is a `hidden beast` number, since 1 + 9 + 8 + 83 + 554 + 2 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1143116100 + 845239329 = 33810^2 + 29073^2 .

It is not a de Polignac number, because 1988355429 - 2¹³ = 1988347237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1988355419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 110464182 + ... + 110464199.

It is an arithmetic number, because the mean of its divisors is an integer number (478678161).

Almost surely, 2^1988355429 is an apocalyptic number.

It is an amenable number.

1988355429 is a deficient number, since it is larger than the sum of its proper divisors (883713537).

1988355429 is a wasteful number, since it uses less digits than its factorization.

1988355429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220928387 (or 220928384 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 54.

The square root of 1988355429 is about 44590.9792334728. The cubic root of 1988355429 is about 1257.4710822346.

The spelling of 1988355429 in words is "one billion, nine hundred eighty-eight million, three hundred fifty-five thousand, four hundred twenty-nine".