1220128795 has 16 divisors (see below), whose sum is σ = 1552320000. Its totient is φ = 918066528.

The previous prime is 1220128787. The next prime is 1220128841. The reversal of 1220128795 is 5978210221.

It is a cyclic number.

It is not a de Polignac number, because 1220128795 - 2³ = 1220128787 is a prime.

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, 32995 + ... + 59404.

It is an arithmetic number, because the mean of its divisors is an integer number (97020000).

Almost surely, 2^1220128795 is an apocalyptic number.

1220128795 is a deficient number, since it is larger than the sum of its proper divisors (332191205).

1220128795 is a wasteful number, since it uses less digits than its factorization.

1220128795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92562.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 1220128795 is about 34930.3420395507. The cubic root of 1220128795 is about 1068.5673302702.

The spelling of 1220128795 in words is "one billion, two hundred twenty million, one hundred twenty-eight thousand, seven hundred ninety-five".