1220261208 has 32 divisors (see below), whose sum is σ = 3051509760. Its totient is φ = 406639520.

The previous prime is 1220261197. The next prime is 1220261227. The reversal of 1220261208 is 8021620221.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159241 + ... + 166727.

It is an arithmetic number, because the mean of its divisors is an integer number (95359680).

Almost surely, 2^1220261208 is an apocalyptic number.

It is an amenable number.

1220261208 is an abundant number, since it is smaller than the sum of its proper divisors (1831248552).

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

1220261208 is a wasteful number, since it uses less digits than its factorization.

1220261208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14287 (or 14283 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 1220261208 is about 34932.2373746658. The cubic root of 1220261208 is about 1068.6059838638.

Adding to 1220261208 its reverse (8021620221), we get a palindrome (9241881429).

The spelling of 1220261208 in words is "one billion, two hundred twenty million, two hundred sixty-one thousand, two hundred eight".