1239223328 has 90 divisors (see below), whose sum is σ = 2868758991. Its totient is φ = 526913856.

The previous prime is 1239223303. The next prime is 1239223343. The reversal of 1239223328 is 8233229321.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 619611664 + 619611664 = 24892^2 + 24892^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=24892.

It is a nialpdrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 9757601 + ... + 9757727.

Almost surely, 2^1239223328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1239223328

1239223328 is an abundant number, since it is smaller than the sum of its proper divisors (1629535663).

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

1239223328 is an frugal number, since it uses more digits than its factorization.

1239223328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 136 counting only the distinct ones).

The product of its digits is 31104, while the sum is 35.

The square root of 1239223328 is about 35202.6039945911. The cubic root of 1239223328 is about 1074.1127210448.

The spelling of 1239223328 in words is "one billion, two hundred thirty-nine million, two hundred twenty-three thousand, three hundred twenty-eight".