1220431044 has 48 divisors (see below), whose sum is σ = 3320912000. Its totient is φ = 348693408.

The previous prime is 1220431039. The next prime is 1220431057. The reversal of 1220431044 is 4401340221.

It is a super-3 number, since 3×1220431044³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1220431044.

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, 144139 + ... + 152370.

Almost surely, 2^1220431044 is an apocalyptic number.

1220431044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1220431044 is an abundant number, since it is smaller than the sum of its proper divisors (2100480956).

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

1220431044 is a wasteful number, since it uses less digits than its factorization.

1220431044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296537 (or 296521 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1220431044 is about 34934.6682251313. The cubic root of 1220431044 is about 1068.6555577707.

Adding to 1220431044 its reverse (4401340221), we get a palindrome (5621771265).

The spelling of 1220431044 in words is "one billion, two hundred twenty million, four hundred thirty-one thousand, forty-four".