1989828055 has 8 divisors (see below), whose sum is σ = 2388607344. Its totient is φ = 1591320000.

The previous prime is 1989828023. The next prime is 1989828079. The reversal of 1989828055 is 5508289891.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1989828055 - 2⁵ = 1989828023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1989827987 and 1989828005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51301 + ... + 81310.

It is an arithmetic number, because the mean of its divisors is an integer number (298575918).

Almost surely, 2^1989828055 is an apocalyptic number.

1989828055 is a deficient number, since it is larger than the sum of its proper divisors (398779289).

1989828055 is a wasteful number, since it uses less digits than its factorization.

1989828055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135617.

The product of its (nonzero) digits is 2073600, while the sum is 55.

The square root of 1989828055 is about 44607.4887771101. The cubic root of 1989828055 is about 1257.7814438549.

The spelling of 1989828055 in words is "one billion, nine hundred eighty-nine million, eight hundred twenty-eight thousand, fifty-five".