2196864 has 48 divisors (see below), whose sum is σ = 6325020. Its totient is φ = 731904.

The previous prime is 2196853. The next prime is 2196869. The reversal of 2196864 is 4686912.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×2196864² = 9652422868992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2196869) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 199 + ... + 2105.

2^2196864 is an apocalyptic number.

2196864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2196864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3162510).

2196864 is an abundant number, since it is smaller than the sum of its proper divisors (4128156).

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

2196864 is a wasteful number, since it uses less digits than its factorization.

2196864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927 (or 1912 counting only the distinct ones).

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

The square root of 2196864 is about 1482.1821750379. The cubic root of 2196864 is about 129.9973174989.

The spelling of 2196864 in words is "two million, one hundred ninety-six thousand, eight hundred sixty-four".