1223667928 has 32 divisors (see below), whose sum is σ = 2623341600. Its totient is φ = 524189952.

The previous prime is 1223667917. The next prime is 1223667937. The reversal of 1223667928 is 8297663221.

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, 179038 + ... + 185746.

It is an arithmetic number, because the mean of its divisors is an integer number (81979425).

Almost surely, 2^1223667928 is an apocalyptic number.

It is an amenable number.

1223667928 is an abundant number, since it is smaller than the sum of its proper divisors (1399673672).

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

1223667928 is a wasteful number, since it uses less digits than its factorization.

1223667928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9979 (or 9975 counting only the distinct ones).

The product of its digits is 435456, while the sum is 46.

The square root of 1223667928 is about 34980.9652239614. The cubic root of 1223667928 is about 1069.5995030679.

The spelling of 1223667928 in words is "one billion, two hundred twenty-three million, six hundred sixty-seven thousand, nine hundred twenty-eight".