1228724438 has 16 divisors (see below), whose sum is σ = 1870387200. Its totient is φ = 605274600.

The previous prime is 1228724437. The next prime is 1228724467. The reversal of 1228724438 is 8344278221.

It is a junction number, because it is equal to n+sod(n) for n = 1228724395 and 1228724404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228724437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297713 + ... + 301811.

It is an arithmetic number, because the mean of its divisors is an integer number (116899200).

Almost surely, 2^1228724438 is an apocalyptic number.

1228724438 is a deficient number, since it is larger than the sum of its proper divisors (641662762).

1228724438 is a wasteful number, since it uses less digits than its factorization.

1228724438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6283.

The product of its digits is 172032, while the sum is 41.

The square root of 1228724438 is about 35053.1658769932. The cubic root of 1228724438 is about 1071.0707649538.

The spelling of 1228724438 in words is "one billion, two hundred twenty-eight million, seven hundred twenty-four thousand, four hundred thirty-eight".