1288946934 has 72 divisors (see below), whose sum is σ = 3175688880. Its totient is φ = 377102880.

The previous prime is 1288946917. The next prime is 1288946969. The reversal of 1288946934 is 4396498821.

It is a super-2 number, since 2×1288946934² = 3322768397336000712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 52959 + ... + 73365.

It is an arithmetic number, because the mean of its divisors is an integer number (44106790).

Almost surely, 2^1288946934 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1288946934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1587844440).

1288946934 is an abundant number, since it is smaller than the sum of its proper divisors (1886741946).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1288946934 is a wasteful number, since it uses less digits than its factorization.

1288946934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20466 (or 20452 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

The square root of 1288946934 is about 35901.9071081189. The cubic root of 1288946934 is about 1088.2909372566.

The spelling of 1288946934 in words is "one billion, two hundred eighty-eight million, nine hundred forty-six thousand, nine hundred thirty-four".