1224788138 has 8 divisors (see below), whose sum is σ = 2099636832. Its totient is φ = 524909196.

The previous prime is 1224788119. The next prime is 1224788143. The reversal of 1224788138 is 8318874221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43742420 + ... + 43742447.

It is an arithmetic number, because the mean of its divisors is an integer number (262454604).

Almost surely, 2^1224788138 is an apocalyptic number.

1224788138 is a deficient number, since it is larger than the sum of its proper divisors (874848694).

1224788138 is an equidigital number, since it uses as much as digits as its factorization.

1224788138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87484876.

The product of its digits is 172032, while the sum is 44.

The square root of 1224788138 is about 34996.9732691271. The cubic root of 1224788138 is about 1069.9257927399.

The spelling of 1224788138 in words is "one billion, two hundred twenty-four million, seven hundred eighty-eight thousand, one hundred thirty-eight".