2199620 has 24 divisors (see below), whose sum is σ = 4666200. Its totient is φ = 870912.

The previous prime is 2199601. The next prime is 2199623. The reversal of 2199620 is 269912.

It can be written as a sum of positive squares in 4 ways, for example, as 222784 + 1976836 = 472^2 + 1406^2 .

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2199623) 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, 1676 + ... + 2684.

It is an arithmetic number, because the mean of its divisors is an integer number (194425).

2^2199620 is an apocalyptic number.

2199620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2199620 is an abundant number, since it is smaller than the sum of its proper divisors (2466580).

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

2199620 is a wasteful number, since it uses less digits than its factorization.

2199620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127 (or 1125 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 2199620 is about 1483.1115939133. Note that the first 3 decimals coincide. The cubic root of 2199620 is about 130.0516560002.

The spelling of 2199620 in words is "two million, one hundred ninety-nine thousand, six hundred twenty".