1210442220 has 108 divisors (see below), whose sum is σ = 3975937056. Its totient is φ = 297947520.

The previous prime is 1210442209. The next prime is 1210442237. The reversal of 1210442220 is 222440121.

1210442220 is a `hidden beast` number, since 1 + 2 + 1 + 0 + 442 + 220 = 666.

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 = 1210442193 and 1210442202.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10525 + ... + 50315.

It is an arithmetic number, because the mean of its divisors is an integer number (36814232).

Almost surely, 2^1210442220 is an apocalyptic number.

1210442220 is a gapful number since it is divisible by the number (10) 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 1210442220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1987968528).

1210442220 is an abundant number, since it is smaller than the sum of its proper divisors (2765494836).

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

1210442220 is a wasteful number, since it uses less digits than its factorization.

1210442220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39832 (or 39814 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1210442220 is about 34791.4101467589. The cubic root of 1210442220 is about 1065.7320365533.

Adding to 1210442220 its reverse (222440121), we get a palindrome (1432882341).

The spelling of 1210442220 in words is "one billion, two hundred ten million, four hundred forty-two thousand, two hundred twenty".