1223612928 has 60 divisors (see below), whose sum is σ = 3531443058. Its totient is φ = 407869440.

The previous prime is 1223612917. The next prime is 1223612953. The reversal of 1223612928 is 8292163221.

It is a happy number.

1223612928 is a `hidden beast` number, since 1 + 2 + 2 + 361 + 292 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1031180544 + 192432384 = 32112^2 + 13872^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1223612892 and 1223612901.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128163 + ... + 137378.

Almost surely, 2^1223612928 is an apocalyptic number.

1223612928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1223612928 is an abundant number, since it is smaller than the sum of its proper divisors (2307830130).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1223612928 is an equidigital number, since it uses as much as digits as its factorization.

1223612928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265565 (or 265546 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 1223612928 is about 34980.1790732981. The cubic root of 1223612928 is about 1069.5834777905.

The spelling of 1223612928 in words is "one billion, two hundred twenty-three million, six hundred twelve thousand, nine hundred twenty-eight".