2149686 has 96 divisors (see below), whose sum is σ = 6128640. Its totient is φ = 546480.

The previous prime is 2149681. The next prime is 2149687. The reversal of 2149686 is 6869412.

It is a super-2 number, since 2×2149686² = 9242299797192, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹⁷ + 1 + 4 + 9⁵ + 6⁷ + 8 + 6⁸ .

It is a self number, because there is not a number n which added to its sum of digits gives 2149686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2149681) 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, 45715 + ... + 45761.

It is an arithmetic number, because the mean of its divisors is an integer number (63840).

2^2149686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2149686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3064320).

2149686 is an abundant number, since it is smaller than the sum of its proper divisors (3978954).

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

2149686 is a wasteful number, since it uses less digits than its factorization.

2149686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 70 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 2149686 is about 1466.1807528405. The cubic root of 2149686 is about 129.0600045345.

The spelling of 2149686 in words is "two million, one hundred forty-nine thousand, six hundred eighty-six".