1989152276 has 12 divisors (see below), whose sum is σ = 3481345140. Its totient is φ = 994482240.

The previous prime is 1989152257. The next prime is 1989152279. The reversal of 1989152276 is 6722519891.

It can be written as a sum of positive squares in 2 ways, for example, as 1280208400 + 708943876 = 35780^2 + 26626^2 .

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49160 + ... + 79968.

It is an arithmetic number, because the mean of its divisors is an integer number (290112095).

Almost surely, 2^1989152276 is an apocalyptic number.

It is an amenable number.

1989152276 is a deficient number, since it is larger than the sum of its proper divisors (1492192864).

1989152276 is a wasteful number, since it uses less digits than its factorization.

1989152276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46954 (or 46952 counting only the distinct ones).

The product of its digits is 544320, while the sum is 50.

The square root of 1989152276 is about 44599.9134079877. The cubic root of 1989152276 is about 1257.6390398375.

The spelling of 1989152276 in words is "one billion, nine hundred eighty-nine million, one hundred fifty-two thousand, two hundred seventy-six".