1220420432 has 160 divisors (see below), whose sum is σ = 3106301184. Its totient is φ = 450662400.

The previous prime is 1220420419. The next prime is 1220420437. The reversal of 1220420432 is 2340240221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220420437) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1868618 + ... + 1869270.

Almost surely, 2^1220420432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220420432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1553150592).

1220420432 is an abundant number, since it is smaller than the sum of its proper divisors (1885880752).

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

1220420432 is a wasteful number, since it uses less digits than its factorization.

1220420432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757 (or 751 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 1220420432 is about 34934.5163412920. The cubic root of 1220420432 is about 1068.6524603390.

Adding to 1220420432 its reverse (2340240221), we get a palindrome (3560660653).

The spelling of 1220420432 in words is "one billion, two hundred twenty million, four hundred twenty thousand, four hundred thirty-two".