2156994 has 96 divisors (see below), whose sum is σ = 6065280. Its totient is φ = 539136.

The previous prime is 2156993. The next prime is 2157007. The reversal of 2156994 is 4996512.

2156994 is a `hidden beast` number, since 2 + 1 + 569 + 94 = 666.

It is not an unprimeable number, because it can be changed into a prime (2156993) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40672 + ... + 40724.

It is an arithmetic number, because the mean of its divisors is an integer number (63180).

2^2156994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2156994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3032640).

2156994 is an abundant number, since it is smaller than the sum of its proper divisors (3908286).

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

2156994 is a wasteful number, since it uses less digits than its factorization.

2156994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104 (or 101 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 2156994 is about 1468.6708276534. The cubic root of 2156994 is about 129.2060884644.

The spelling of 2156994 in words is "two million, one hundred fifty-six thousand, nine hundred ninety-four".