2156386 has 8 divisors (see below), whose sum is σ = 3404880. Its totient is φ = 1021428.

The previous prime is 2156383. The next prime is 2156387. The reversal of 2156386 is 6836512.

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

It is not an unprimeable number, because it can be changed into a prime (2156383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28336 + ... + 28411.

It is an arithmetic number, because the mean of its divisors is an integer number (425610).

2^2156386 is an apocalyptic number.

2156386 is a deficient number, since it is larger than the sum of its proper divisors (1248494).

2156386 is a wasteful number, since it uses less digits than its factorization.

2156386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56768.

The product of its digits is 8640, while the sum is 31.

The square root of 2156386 is about 1468.4638231839. The cubic root of 2156386 is about 129.1939473884.

The spelling of 2156386 in words is "two million, one hundred fifty-six thousand, three hundred eighty-six".