1220460720 has 80 divisors (see below), whose sum is σ = 3835311072. Its totient is φ = 320993280.

The previous prime is 1220460697. The next prime is 1220460749. The reversal of 1220460720 is 270640221.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17311 + ... + 52350.

Almost surely, 2^1220460720 is an apocalyptic number.

1220460720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220460720 is an abundant number, since it is smaller than the sum of its proper divisors (2614850352).

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

1220460720 is a wasteful number, since it uses less digits than its factorization.

1220460720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69750 (or 69744 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 1220460720 is about 34935.0929582275. The cubic root of 1220460720 is about 1068.6642195097.

The spelling of 1220460720 in words is "one billion, two hundred twenty million, four hundred sixty thousand, seven hundred twenty".