1220776260 has 72 divisors (see below), whose sum is σ = 3757188288. Its totient is φ = 295944000.

The previous prime is 1220776253. The next prime is 1220776279. The reversal of 1220776260 is 626770221.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76816 + ... + 91335.

Almost surely, 2^1220776260 is an apocalyptic number.

1220776260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220776260 is an abundant number, since it is smaller than the sum of its proper divisors (2536412028).

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

1220776260 is a wasteful number, since it uses less digits than its factorization.

1220776260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168185 (or 168172 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 1220776260 is about 34939.6087556801. The cubic root of 1220776260 is about 1068.7563096649.

The spelling of 1220776260 in words is "one billion, two hundred twenty million, seven hundred seventy-six thousand, two hundred sixty".