2185128942 has 8 divisors (see below), whose sum is σ = 4370257896. Its totient is φ = 728376312.

The previous prime is 2185128931. The next prime is 2185128971. The reversal of 2185128942 is 2498215812.

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

2185128942 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 2185128894 and 2185128903.

It is a congruent number.

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, 182094073 + ... + 182094084.

It is an arithmetic number, because the mean of its divisors is an integer number (546282237).

Almost surely, 2^2185128942 is an apocalyptic number.

2185128942 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2185128942 is a wasteful number, since it uses less digits than its factorization.

2185128942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364188162.

The product of its digits is 92160, while the sum is 42.

The square root of 2185128942 is about 46745.3627860561. The cubic root of 2185128942 is about 1297.6543385816.

The spelling of 2185128942 in words is "two billion, one hundred eighty-five million, one hundred twenty-eight thousand, nine hundred forty-two".