1989152277 has 32 divisors (see below), whose sum is σ = 3069922560. Its totient is φ = 1122163200.

The previous prime is 1989152257. The next prime is 1989152279. The reversal of 1989152277 is 7722519891.

It is not a de Polignac number, because 1989152277 - 2²⁸ = 1720716821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989152279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 866343 + ... + 868635.

It is an arithmetic number, because the mean of its divisors is an integer number (95935080).

Almost surely, 2^1989152277 is an apocalyptic number.

It is an amenable number.

1989152277 is a deficient number, since it is larger than the sum of its proper divisors (1080770283).

1989152277 is a wasteful number, since it uses less digits than its factorization.

1989152277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2813.

The product of its digits is 635040, while the sum is 51.

The square root of 1989152277 is about 44599.9134191985. The cubic root of 1989152277 is about 1257.6390400482.

The spelling of 1989152277 in words is "one billion, nine hundred eighty-nine million, one hundred fifty-two thousand, two hundred seventy-seven".