1223888805 has 32 divisors (see below), whose sum is σ = 2186784000. Its totient is φ = 649446336.

The previous prime is 1223888761. The next prime is 1223888821. The reversal of 1223888805 is 5088883221.

It is not a de Polignac number, because 1223888805 - 2¹³ = 1223880613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4087 + ... + 49643.

It is an arithmetic number, because the mean of its divisors is an integer number (68337000).

Almost surely, 2^1223888805 is an apocalyptic number.

1223888805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1223888805 is a deficient number, since it is larger than the sum of its proper divisors (962895195).

1223888805 is a wasteful number, since it uses less digits than its factorization.

1223888805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45770 (or 45764 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 45.

The square root of 1223888805 is about 34984.1221842138. The cubic root of 1223888805 is about 1069.6638548720.

The spelling of 1223888805 in words is "one billion, two hundred twenty-three million, eight hundred eighty-eight thousand, eight hundred five".