1220945788 has 48 divisors (see below), whose sum is σ = 2243808000. Its totient is φ = 580631040.

The previous prime is 1220945779. The next prime is 1220945801. The reversal of 1220945788 is 8875490221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3498238 + ... + 3498586.

It is an arithmetic number, because the mean of its divisors is an integer number (46746000).

Almost surely, 2^1220945788 is an apocalyptic number.

It is an amenable number.

1220945788 is a deficient number, since it is larger than the sum of its proper divisors (1022862212).

1220945788 is a wasteful number, since it uses less digits than its factorization.

1220945788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790 (or 788 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 46.

The square root of 1220945788 is about 34942.0346860340. The cubic root of 1220945788 is about 1068.8057797546.

The spelling of 1220945788 in words is "one billion, two hundred twenty million, nine hundred forty-five thousand, seven hundred eighty-eight".