1220320838 has 16 divisors (see below), whose sum is σ = 1997581824. Its totient is φ = 554498760.

The previous prime is 1220320837. The next prime is 1220320861. The reversal of 1220320838 is 8380230221.

It is a self number, because there is not a number n which added to its sum of digits gives 1220320838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220320837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69731 + ... + 85457.

It is an arithmetic number, because the mean of its divisors is an integer number (124848864).

Almost surely, 2^1220320838 is an apocalyptic number.

1220320838 is a deficient number, since it is larger than the sum of its proper divisors (777260986).

1220320838 is a wasteful number, since it uses less digits than its factorization.

1220320838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19267.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 1220320838 is about 34933.0908738405. The cubic root of 1220320838 is about 1068.6233899559.

The spelling of 1220320838 in words is "one billion, two hundred twenty million, three hundred twenty thousand, eight hundred thirty-eight".