1222404040 has 192 divisors, whose sum is σ = 3443679360. Its totient is φ = 385781760.

The previous prime is 1222403999. The next prime is 1222404077. The reversal of 1222404040 is 404042221.

It is a junction number, because it is equal to n+sod(n) for n = 1222403999 and 1222404017.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1263637 + ... + 1264603.

It is an arithmetic number, because the mean of its divisors is an integer number (17935830).

Almost surely, 2^1222404040 is an apocalyptic number.

1222404040 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 1222404040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1721839680).

1222404040 is an abundant number, since it is smaller than the sum of its proper divisors (2221275320).

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

1222404040 is a wasteful number, since it uses less digits than its factorization.

1222404040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032 (or 1015 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 1222404040 is about 34962.8951890429. The cubic root of 1222404040 is about 1069.2311243484.

Adding to 1222404040 its reverse (404042221), we get a palindrome (1626446261).

The spelling of 1222404040 in words is "one billion, two hundred twenty-two million, four hundred four thousand, forty".