1220431420 has 48 divisors (see below), whose sum is σ = 2827395648. Its totient is φ = 439626240.

The previous prime is 1220431409. The next prime is 1220431439. The reversal of 1220431420 is 241340221.

It is a congruent number.

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, 46584 + ... + 67903.

It is an arithmetic number, because the mean of its divisors is an integer number (58904076).

Almost surely, 2^1220431420 is an apocalyptic number.

1220431420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220431420 is an abundant number, since it is smaller than the sum of its proper divisors (1606964228).

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

1220431420 is a wasteful number, since it uses less digits than its factorization.

1220431420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114550 (or 114548 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1220431420 is about 34934.6736066047. The cubic root of 1220431420 is about 1068.6556675173.

Adding to 1220431420 its reverse (241340221), we get a palindrome (1461771641).

The spelling of 1220431420 in words is "one billion, two hundred twenty million, four hundred thirty-one thousand, four hundred twenty".