2160391890 has 32 divisors (see below), whose sum is σ = 5325076800. Its totient is φ = 560533824.

The previous prime is 2160391879. The next prime is 2160391931. The reversal of 2160391890 is 981930612.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 972040 + ... + 974259.

It is an arithmetic number, because the mean of its divisors is an integer number (166408650).

Almost surely, 2^2160391890 is an apocalyptic number.

2160391890 is an abundant number, since it is smaller than the sum of its proper divisors (3164684910).

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

2160391890 is a wasteful number, since it uses less digits than its factorization.

2160391890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946346.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 2160391890 is about 46480.0160283965. The cubic root of 2160391890 is about 1292.7389853483.

The spelling of 2160391890 in words is "two billion, one hundred sixty million, three hundred ninety-one thousand, eight hundred ninety".