128228834 has 32 divisors (see below), whose sum is σ = 210432000. Its totient is φ = 58378320.

The previous prime is 128228833. The next prime is 128228851. The reversal of 128228834 is 438822821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (128228833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234149 + ... + 234695.

It is an arithmetic number, because the mean of its divisors is an integer number (6576000).

Almost surely, 2^128228834 is an apocalyptic number.

128228834 is a deficient number, since it is larger than the sum of its proper divisors (82203166).

128228834 is a wasteful number, since it uses less digits than its factorization.

128228834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798.

The product of its digits is 49152, while the sum is 38.

The square root of 128228834 is about 11323.8171126171. The cubic root of 128228834 is about 504.2685669705.

The spelling of 128228834 in words is "one hundred twenty-eight million, two hundred twenty-eight thousand, eight hundred thirty-four".