1220180905 has 8 divisors (see below), whose sum is σ = 1464408000. Its totient is φ = 976017456.

The previous prime is 1220180903. The next prime is 1220180917. The reversal of 1220180905 is 5090810221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220180905 - 2¹ = 1220180903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220180903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55036 + ... + 73954.

It is an arithmetic number, because the mean of its divisors is an integer number (183051000).

Almost surely, 2^1220180905 is an apocalyptic number.

It is an amenable number.

1220180905 is a deficient number, since it is larger than the sum of its proper divisors (244227095).

1220180905 is a wasteful number, since it uses less digits than its factorization.

1220180905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31823.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1220180905 is about 34931.0879446948. The cubic root of 1220180905 is about 1068.5825423940.

The spelling of 1220180905 in words is "one billion, two hundred twenty million, one hundred eighty thousand, nine hundred five".