2857857989 has 8 divisors (see below), whose sum is σ = 3321481920. Its totient is φ = 2408073696.

The previous prime is 2857857979. The next prime is 2857858007. The reversal of 2857857989 is 9897587582.

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

It is not a de Polignac number, because 2857857989 - 2¹² = 2857853893 is a prime.

It is a super-2 number, since 2×2857857989² = 16334704570582248242, 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 (2857857929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3459464 + ... + 3460289.

It is an arithmetic number, because the mean of its divisors is an integer number (415185240).

Almost surely, 2^2857857989 is an apocalyptic number.

It is an amenable number.

2857857989 is a deficient number, since it is larger than the sum of its proper divisors (463623931).

2857857989 is an equidigital number, since it uses as much as digits as its factorization.

2857857989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6919819.

The product of its digits is 101606400, while the sum is 68.

The square root of 2857857989 is about 53458.9374099411. The cubic root of 2857857989 is about 1419.1017907893.

The spelling of 2857857989 in words is "two billion, eight hundred fifty-seven million, eight hundred fifty-seven thousand, nine hundred eighty-nine".