1226350440 has 288 divisors, whose sum is σ = 4881708000. Its totient is φ = 265483008.

The previous prime is 1226350399. The next prime is 1226350457. The reversal of 1226350440 is 440536221.

1226350440 is a `hidden beast` number, since 1 + 22 + 635 + 0 + 4 + 4 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 333331 + ... + 336989.

It is an arithmetic number, because the mean of its divisors is an integer number (16950375).

Almost surely, 2^1226350440 is an apocalyptic number.

1226350440 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 1226350440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2440854000).

1226350440 is an abundant number, since it is smaller than the sum of its proper divisors (3655357560).

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

1226350440 is a wasteful number, since it uses less digits than its factorization.

1226350440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3709 (or 3695 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 1226350440 is about 35019.2866860534. The cubic root of 1226350440 is about 1070.3805209041.

Adding to 1226350440 its reverse (440536221), we get a palindrome (1666886661).

The spelling of 1226350440 in words is "one billion, two hundred twenty-six million, three hundred fifty thousand, four hundred forty".