2197620 has 72 divisors (see below), whose sum is σ = 6912360. Its totient is φ = 564480.

The previous prime is 2197609. The next prime is 2197631. The reversal of 2197620 is 267912.

It is an interprime number because it is at equal distance from previous prime (2197609) and next prime (2197631).

It can be written as a sum of positive squares in 4 ways, for example, as 1296 + 2196324 = 36^2 + 1482^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5010 + ... + 5430.

It is an arithmetic number, because the mean of its divisors is an integer number (96005).

2^2197620 is an apocalyptic number.

2197620 is a gapful number since it is divisible by the number (20) 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 2197620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3456180).

2197620 is an abundant number, since it is smaller than the sum of its proper divisors (4714740).

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

2197620 is a wasteful number, since it uses less digits than its factorization.

2197620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465 (or 460 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 2197620 is about 1482.4371824803. The cubic root of 2197620 is about 130.0122276467.

The spelling of 2197620 in words is "two million, one hundred ninety-seven thousand, six hundred twenty".