1220431344 has 80 divisors (see below), whose sum is σ = 3472944384. Its totient is φ = 366220800.

The previous prime is 1220431339. The next prime is 1220431349. The reversal of 1220431344 is 4431340221.

It is an interprime number because it is at equal distance from previous prime (1220431339) and next prime (1220431349).

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220431349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43164 + ... + 65604.

Almost surely, 2^1220431344 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 1220431344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1736472192).

1220431344 is an abundant number, since it is smaller than the sum of its proper divisors (2252513040).

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

1220431344 is a wasteful number, since it uses less digits than its factorization.

1220431344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22566 (or 22560 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 1220431344 is about 34934.6725188601. The cubic root of 1220431344 is about 1068.6556453345.

Adding to 1220431344 its reverse (4431340221), we get a palindrome (5651771565).

The spelling of 1220431344 in words is "one billion, two hundred twenty million, four hundred thirty-one thousand, three hundred forty-four".