2689442306 has 8 divisors (see below), whose sum is σ = 4048728060. Its totient is φ = 1339866288.

The previous prime is 2689442291. The next prime is 2689442309. The reversal of 2689442306 is 6032449862.

It can be written as a sum of positive squares in 2 ways, for example, as 2380561681 + 308880625 = 48791^2 + 17575^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2689442309) 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, 2426741 + ... + 2427848.

Almost surely, 2^2689442306 is an apocalyptic number.

2689442306 is a deficient number, since it is larger than the sum of its proper divisors (1359285754).

2689442306 is a wasteful number, since it uses less digits than its factorization.

2689442306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4854868.

The product of its (nonzero) digits is 497664, while the sum is 44.

The square root of 2689442306 is about 51859.8332623621. The cubic root of 2689442306 is about 1390.6592987112.

The spelling of 2689442306 in words is "two billion, six hundred eighty-nine million, four hundred forty-two thousand, three hundred six".