1220016424 has 32 divisors (see below), whose sum is σ = 2642284800. Its totient is φ = 521931520.

The previous prime is 1220016379. The next prime is 1220016449. The reversal of 1220016424 is 4246100221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1220016395 and 1220016404.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 406264 + ... + 409255.

It is an arithmetic number, because the mean of its divisors is an integer number (82571400).

Almost surely, 2^1220016424 is an apocalyptic number.

It is an amenable number.

1220016424 is an abundant number, since it is smaller than the sum of its proper divisors (1422268376).

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

1220016424 is a wasteful number, since it uses less digits than its factorization.

1220016424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815553 (or 815549 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1220016424 is about 34928.7335012308. The cubic root of 1220016424 is about 1068.5345250815.

Adding to 1220016424 its reverse (4246100221), we get a palindrome (5466116645).

The spelling of 1220016424 in words is "one billion, two hundred twenty million, sixteen thousand, four hundred twenty-four".