2145882386 has 4 divisors (see below), whose sum is σ = 3218823582. Its totient is φ = 1072941192.

The previous prime is 2145882383. The next prime is 2145882407. The reversal of 2145882386 is 6832885412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1183704025 + 962178361 = 34405^2 + 31019^2 .

It is a super-2 number, since 2×2145882386² = 9209622429090105992, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2145882386.

It is not an unprimeable number, because it can be changed into a prime (2145882383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 536470595 + ... + 536470598.

Almost surely, 2^2145882386 is an apocalyptic number.

2145882386 is a deficient number, since it is larger than the sum of its proper divisors (1072941196).

2145882386 is a wasteful number, since it uses less digits than its factorization.

2145882386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072941195.

The product of its digits is 737280, while the sum is 47.

The square root of 2145882386 is about 46323.6698243997. The cubic root of 2145882386 is about 1289.8384081387.

The spelling of 2145882386 in words is "two billion, one hundred forty-five million, eight hundred eighty-two thousand, three hundred eighty-six".