2220440 has 16 divisors (see below), whose sum is σ = 4996080. Its totient is φ = 888160.

The previous prime is 2220431. The next prime is 2220457. The reversal of 2220440 is 440222.

2220440 = T₃₁₃ + T₃₁₄ + ... + T₃₅₂.

2220440 = 365² + 366² + ... + 380².

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27716 + ... + 27795.

It is an arithmetic number, because the mean of its divisors is an integer number (312255).

2^2220440 is an apocalyptic number.

2220440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2220440 is an abundant number, since it is smaller than the sum of its proper divisors (2775640).

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

2220440 is a wasteful number, since it uses less digits than its factorization.

2220440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55522 (or 55518 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 2220440 is about 1490.1140895918. The cubic root of 2220440 is about 130.4606928881.

Adding to 2220440 its reverse (440222), we get a palindrome (2660662).

The spelling of 2220440 in words is "two million, two hundred twenty thousand, four hundred forty".