2199378 has 16 divisors (see below), whose sum is σ = 4445280. Its totient is φ = 725376.

The previous prime is 2199377. The next prime is 2199401. The reversal of 2199378 is 8739912.

It is a super-3 number, since 3×2199378³ = 31916913339581274456, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2199371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1308 + ... + 2471.

It is an arithmetic number, because the mean of its divisors is an integer number (277830).

2^2199378 is an apocalyptic number.

2199378 is an abundant number, since it is smaller than the sum of its proper divisors (2245902).

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

2199378 is a wasteful number, since it uses less digits than its factorization.

2199378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3881.

The product of its digits is 27216, while the sum is 39.

The square root of 2199378 is about 1483.0300064395. The cubic root of 2199378 is about 130.0468864407.

It can be divided in two parts, 21 and 99378, that added together give a palindrome (99399).

The spelling of 2199378 in words is "two million, one hundred ninety-nine thousand, three hundred seventy-eight".