1213162438 has 16 divisors (see below), whose sum is σ = 1870014960. Its totient is φ = 589843296.

The previous prime is 1213162343. The next prime is 1213162451. The reversal of 1213162438 is 8342613121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162328 + ... + 169636.

It is an arithmetic number, because the mean of its divisors is an integer number (116875935).

Almost surely, 2^1213162438 is an apocalyptic number.

1213162438 is a deficient number, since it is larger than the sum of its proper divisors (656852522).

1213162438 is a wasteful number, since it uses less digits than its factorization.

1213162438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9591.

The product of its digits is 6912, while the sum is 31.

The square root of 1213162438 is about 34830.4814494431. The cubic root of 1213162438 is about 1066.5297765520.

Adding to 1213162438 its reverse (8342613121), we get a palindrome (9555775559).

The spelling of 1213162438 in words is "one billion, two hundred thirteen million, one hundred sixty-two thousand, four hundred thirty-eight".