2215620 has 96 divisors (see below), whose sum is σ = 7539840. Its totient is φ = 535680.

The previous prime is 2215583. The next prime is 2215639. The reversal of 2215620 is 265122.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2215593 and 2215602.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5754 + ... + 6126.

It is an arithmetic number, because the mean of its divisors is an integer number (78540).

2^2215620 is an apocalyptic number.

2215620 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 2215620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3769920).

2215620 is an abundant number, since it is smaller than the sum of its proper divisors (5324220).

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

2215620 is a wasteful number, since it uses less digits than its factorization.

2215620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 394 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2215620 is about 1488.4958851136. The cubic root of 2215620 is about 130.3662257117.

The spelling of 2215620 in words is "two million, two hundred fifteen thousand, six hundred twenty".