2642220 has 120 divisors (see below), whose sum is σ = 9513504. Its totient is φ = 601344.

The previous prime is 2642203. The next prime is 2642231. The reversal of 2642220 is 222462.

It is a happy number.

2642220 is a `hidden beast` number, since 2 + 642 + 2 + 20 = 666.

2642220 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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 = 2642193 and 2642202.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11224 + ... + 11456.

2^2642220 is an apocalyptic number.

2642220 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 2642220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4756752).

2642220 is an abundant number, since it is smaller than the sum of its proper divisors (6871284).

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

2642220 is a wasteful number, since it uses less digits than its factorization.

2642220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 2642220 is about 1625.4906951441. The cubic root of 2642220 is about 138.2471939977.

Adding to 2642220 its reverse (222462), we get a palindrome (2864682).

The spelling of 2642220 in words is "two million, six hundred forty-two thousand, two hundred twenty".