1243229928 has 16 divisors (see below), whose sum is σ = 3108074880. Its totient is φ = 414409968.

The previous prime is 1243229917. The next prime is 1243229929. The reversal of 1243229928 is 8299223421.

It is a self number, because there is not a number n which added to its sum of digits gives 1243229928.

It is not an unprimeable number, because it can be changed into a prime (1243229929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25900600 + ... + 25900647.

It is an arithmetic number, because the mean of its divisors is an integer number (194254680).

Almost surely, 2^1243229928 is an apocalyptic number.

It is an amenable number.

1243229928 is an abundant number, since it is smaller than the sum of its proper divisors (1864844952).

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

1243229928 is a wasteful number, since it uses less digits than its factorization.

1243229928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51801256 (or 51801252 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 1243229928 is about 35259.4657928903. The cubic root of 1243229928 is about 1075.2690663785.

The spelling of 1243229928 in words is "one billion, two hundred forty-three million, two hundred twenty-nine thousand, nine hundred twenty-eight".