1220776044 has 24 divisors (see below), whose sum is σ = 2849128128. Its totient is φ = 406832400.

The previous prime is 1220776033. The next prime is 1220776093. The reversal of 1220776044 is 4406770221.

It is a junction number, because it is equal to n+sod(n) for n = 1220775996 and 1220776014.

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, 61519 + ... + 78905.

It is an arithmetic number, because the mean of its divisors is an integer number (118713672).

Almost surely, 2^1220776044 is an apocalyptic number.

It is an amenable number.

1220776044 is an abundant number, since it is smaller than the sum of its proper divisors (1628352084).

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

1220776044 is a wasteful number, since it uses less digits than its factorization.

1220776044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23245 (or 23243 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 1220776044 is about 34939.6056646322. The cubic root of 1220776044 is about 1068.7562466308.

The spelling of 1220776044 in words is "one billion, two hundred twenty million, seven hundred seventy-six thousand, forty-four".