2188453946 has 8 divisors (see below), whose sum is σ = 3751635360. Its totient is φ = 937908828.

The previous prime is 2188453921. The next prime is 2188453951. The reversal of 2188453946 is 6493548812.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2188453894 and 2188453903.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78159056 + ... + 78159083.

It is an arithmetic number, because the mean of its divisors is an integer number (468954420).

Almost surely, 2^2188453946 is an apocalyptic number.

2188453946 is a deficient number, since it is larger than the sum of its proper divisors (1563181414).

2188453946 is a wasteful number, since it uses less digits than its factorization.

2188453946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156318148.

The product of its digits is 1658880, while the sum is 50.

The square root of 2188453946 is about 46780.9143348011. The cubic root of 2188453946 is about 1298.3121974291.

The spelling of 2188453946 in words is "two billion, one hundred eighty-eight million, four hundred fifty-three thousand, nine hundred forty-six".