1220949120 has 128 divisors (see below), whose sum is σ = 4096728000. Its totient is φ = 308441088.

The previous prime is 1220949113. The next prime is 1220949133. The reversal of 1220949120 is 219490221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 19746 + ... + 53214.

Almost surely, 2^1220949120 is an apocalyptic number.

1220949120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220949120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2048364000).

1220949120 is an abundant number, since it is smaller than the sum of its proper divisors (2875778880).

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

1220949120 is a wasteful number, since it uses less digits than its factorization.

1220949120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33510 (or 33498 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 1220949120 is about 34942.0823649650. The cubic root of 1220949120 is about 1068.8067520221.

The spelling of 1220949120 in words is "one billion, two hundred twenty million, nine hundred forty-nine thousand, one hundred twenty".