2171790342 has 24 divisors (see below), whose sum is σ = 4749527016. Its totient is φ = 717163776.

The previous prime is 2171790331. The next prime is 2171790359. The reversal of 2171790342 is 2430971712.

2171790342 is a `hidden beast` number, since 217 + 17 + 90 + 342 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 2171790297 and 2171790306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 561883 + ... + 565734.

It is an arithmetic number, because the mean of its divisors is an integer number (197896959).

Almost surely, 2^2171790342 is an apocalyptic number.

2171790342 is an abundant number, since it is smaller than the sum of its proper divisors (2577736674).

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

2171790342 is a wasteful number, since it uses less digits than its factorization.

2171790342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127732 (or 1127729 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 2171790342 is about 46602.4714151514. The cubic root of 2171790342 is about 1295.0085402656.

The spelling of 2171790342 in words is "two billion, one hundred seventy-one million, seven hundred ninety thousand, three hundred forty-two".