1220013420 has 48 divisors (see below), whose sum is σ = 3472048608. Its totient is φ = 320002560.

The previous prime is 1220013373. The next prime is 1220013433. The reversal of 1220013420 is 243100221.

It is a Harshad number since it is a multiple of its sum of digits (15).

1220013420 is a modest number, since divided by 13420 gives 1220 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 1220013420.

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, 163009 + ... + 170328.

It is an arithmetic number, because the mean of its divisors is an integer number (72334346).

Almost surely, 2^1220013420 is an apocalyptic number.

1220013420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220013420 is an abundant number, since it is smaller than the sum of its proper divisors (2252035188).

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

1220013420 is a wasteful number, since it uses less digits than its factorization.

1220013420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333410 (or 333408 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1220013420 is about 34928.6904993588. The cubic root of 1220013420 is about 1068.5336480769.

Adding to 1220013420 its reverse (243100221), we get a palindrome (1463113641).

The spelling of 1220013420 in words is "one billion, two hundred twenty million, thirteen thousand, four hundred twenty".