1220323871 has 8 divisors (see below), whose sum is σ = 1316945280. Its totient is φ = 1124095392.

The previous prime is 1220323837. The next prime is 1220323873. The reversal of 1220323871 is 1783230221.

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 1220323871 - 2⁶ = 1220323807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220323873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91760 + ... + 104213.

It is an arithmetic number, because the mean of its divisors is an integer number (164618160).

Almost surely, 2^1220323871 is an apocalyptic number.

1220323871 is a deficient number, since it is larger than the sum of its proper divisors (96621409).

1220323871 is a wasteful number, since it uses less digits than its factorization.

1220323871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196465.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 1220323871 is about 34933.1342853744. The cubic root of 1220323871 is about 1068.6242752783.

The spelling of 1220323871 in words is "one billion, two hundred twenty million, three hundred twenty-three thousand, eight hundred seventy-one".