1220873480 has 32 divisors (see below), whose sum is σ = 2748695040. Its totient is φ = 488041920.

The previous prime is 1220873461. The next prime is 1220873483. The reversal of 1220873480 is 843780221.

It is a Cunningham number, because it is equal to 34941²-1.

It is a self number, because there is not a number n which added to its sum of digits gives 1220873480.

It is not an unprimeable number, because it can be changed into a prime (1220873483) 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, 61145 + ... + 78615.

It is an arithmetic number, because the mean of its divisors is an integer number (85896720).

Almost surely, 2^1220873480 is an apocalyptic number.

1220873480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220873480 is an abundant number, since it is smaller than the sum of its proper divisors (1527821560).

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

1220873480 is a wasteful number, since it uses less digits than its factorization.

1220873480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19229 (or 19225 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 1220873480 is about 34940.9999856902. Note that the first 4 decimals coincide. The cubic root of 1220873480 is about 1068.7846800643.

The spelling of 1220873480 in words is "one billion, two hundred twenty million, eight hundred seventy-three thousand, four hundred eighty".