2400220 has 12 divisors (see below), whose sum is σ = 5040504. Its totient is φ = 960080.

The previous prime is 2400197. The next prime is 2400221. The reversal of 2400220 is 220042.

It is a happy number.

It is a super-2 number, since 2×2400220² = 11522112096800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 2400197 and 2400206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2400221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59986 + ... + 60025.

It is an arithmetic number, because the mean of its divisors is an integer number (420042).

2^2400220 is an apocalyptic number.

2400220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2400220 is an abundant number, since it is smaller than the sum of its proper divisors (2640284).

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

2400220 is a wasteful number, since it uses less digits than its factorization.

2400220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120020 (or 120018 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 10.

The square root of 2400220 is about 1549.2643415505. The cubic root of 2400220 is about 133.8906808706.

Adding to 2400220 its reverse (220042), we get a palindrome (2620262).

The spelling of 2400220 in words is "two million, four hundred thousand, two hundred twenty".