1216023028 has 24 divisors (see below), whose sum is σ = 2443684320. Its totient is φ = 523645920.

The previous prime is 1216022993. The next prime is 1216023031. The reversal of 1216023028 is 8203206121.

It is a junction number, because it is equal to n+sod(n) for n = 1216022993 and 1216023011.

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, 726451 + ... + 728122.

It is an arithmetic number, because the mean of its divisors is an integer number (101820180).

Almost surely, 2^1216023028 is an apocalyptic number.

It is an amenable number.

1216023028 is an abundant number, since it is smaller than the sum of its proper divisors (1227661292).

1216023028 is a wasteful number, since it uses less digits than its factorization.

1216023028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454607 (or 1454605 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1216023028 is about 34871.5217333571. The cubic root of 1216023028 is about 1067.3673971604.

Adding to 1216023028 its reverse (8203206121), we get a palindrome (9419229149).

The spelling of 1216023028 in words is "one billion, two hundred sixteen million, twenty-three thousand, twenty-eight".