1222423040 has 80 divisors (see below), whose sum is σ = 2975113152. Its totient is φ = 481603584.

The previous prime is 1222422997. The next prime is 1222423043. The reversal of 1222423040 is 403242221.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222423043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167957 + ... + 175083.

Almost surely, 2^1222423040 is an apocalyptic number.

1222423040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222423040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1487556576).

1222423040 is an abundant number, since it is smaller than the sum of its proper divisors (1752690112).

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

1222423040 is an frugal number, since it uses more digits than its factorization.

1222423040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7217 (or 7201 counting only the distinct ones).

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

The square root of 1222423040 is about 34963.1669046155. The cubic root of 1222423040 is about 1069.2366640569.

Adding to 1222423040 its reverse (403242221), we get a palindrome (1625665261).

The spelling of 1222423040 in words is "one billion, two hundred twenty-two million, four hundred twenty-three thousand, forty".