2389836856 has 32 divisors (see below), whose sum is σ = 4891985280. Its totient is φ = 1085471200.

The previous prime is 2389836817. The next prime is 2389836857. The reversal of 2389836856 is 6586389832.

It is a happy number.

It is a super-2 number, since 2×2389836856² = 11422640396591929472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2389836856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2389836857) 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, 116061 + ... + 135091.

It is an arithmetic number, because the mean of its divisors is an integer number (152874540).

Almost surely, 2^2389836856 is an apocalyptic number.

It is an amenable number.

2389836856 is an abundant number, since it is smaller than the sum of its proper divisors (2502148424).

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

2389836856 is a wasteful number, since it uses less digits than its factorization.

2389836856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20475 (or 20471 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 58.

The square root of 2389836856 is about 48885.9576565705. The cubic root of 2389836856 is about 1336.9733530383.

The spelling of 2389836856 in words is "two billion, three hundred eighty-nine million, eight hundred thirty-six thousand, eight hundred fifty-six".