2856349439 has 4 divisors (see below), whose sum is σ = 3006683640. Its totient is φ = 2706015240.

The previous prime is 2856349429. The next prime is 2856349459. The reversal of 2856349439 is 9349436582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9349436582 = 2 ⋅4674718291.

It is a cyclic number.

It is not a de Polignac number, because 2856349439 - 2²⁴ = 2839572223 is a prime.

It is a super-2 number, since 2×2856349439² = 16317464235351229442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2856349429) 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, 75167072 + ... + 75167109.

It is an arithmetic number, because the mean of its divisors is an integer number (751670910).

Almost surely, 2^2856349439 is an apocalyptic number.

2856349439 is a deficient number, since it is larger than the sum of its proper divisors (150334201).

2856349439 is a wasteful number, since it uses less digits than its factorization.

2856349439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150334200.

The product of its digits is 5598720, while the sum is 53.

The square root of 2856349439 is about 53444.8261200277. The cubic root of 2856349439 is about 1418.8520509721.

The spelling of 2856349439 in words is "two billion, eight hundred fifty-six million, three hundred forty-nine thousand, four hundred thirty-nine".