1222040736 has 384 divisors, whose sum is σ = 4314562560. Its totient is φ = 329204736.

The previous prime is 1222040717. The next prime is 1222040737. The reversal of 1222040736 is 6370402221.

1222040736 is a `hidden beast` number, since 1 + 2 + 220 + 407 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1222040737) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9622305 + ... + 9622431.

It is an arithmetic number, because the mean of its divisors is an integer number (11235840).

Almost surely, 2^1222040736 is an apocalyptic number.

1222040736 is a gapful number since it is divisible by the number (16) 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 1222040736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2157281280).

1222040736 is an abundant number, since it is smaller than the sum of its proper divisors (3092521824).

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

1222040736 is a wasteful number, since it uses less digits than its factorization.

1222040736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 1222040736 is about 34957.6992377931. The cubic root of 1222040736 is about 1069.1251870801.

Adding to 1222040736 its reverse (6370402221), we get a palindrome (7592442957).

The spelling of 1222040736 in words is "one billion, two hundred twenty-two million, forty thousand, seven hundred thirty-six".