1224213340 has 48 divisors (see below), whose sum is σ = 2960584704. Its totient is φ = 416520000.

The previous prime is 1224213329. The next prime is 1224213409. The reversal of 1224213340 is 433124221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15036 + ... + 51715.

It is an arithmetic number, because the mean of its divisors is an integer number (61678848).

Almost surely, 2^1224213340 is an apocalyptic number.

1224213340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224213340 is an abundant number, since it is smaller than the sum of its proper divisors (1736371364).

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

1224213340 is a wasteful number, since it uses less digits than its factorization.

1224213340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66898 (or 66896 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1224213340 is about 34988.7601952398. The cubic root of 1224213340 is about 1069.7583930573.

Adding to 1224213340 its reverse (433124221), we get a palindrome (1657337561).

The spelling of 1224213340 in words is "one billion, two hundred twenty-four million, two hundred thirteen thousand, three hundred forty".