1234921128 has 96 divisors (see below), whose sum is σ = 3675022560. Its totient is φ = 344615040.

The previous prime is 1234921117. The next prime is 1234921141. The reversal of 1234921128 is 8211294321.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38358 + ... + 62778.

It is an arithmetic number, because the mean of its divisors is an integer number (38281485).

Almost surely, 2^1234921128 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 1234921128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1837511280).

1234921128 is an abundant number, since it is smaller than the sum of its proper divisors (2440101432).

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

1234921128 is a wasteful number, since it uses less digits than its factorization.

1234921128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24487 (or 24476 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 1234921128 is about 35141.4445918206. Note that the first 3 decimals coincide. The cubic root of 1234921128 is about 1072.8682841469.

The spelling of 1234921128 in words is "one billion, two hundred thirty-four million, nine hundred twenty-one thousand, one hundred twenty-eight".