128213954 has 32 divisors (see below), whose sum is σ = 222469632. Its totient is φ = 54864000.

The previous prime is 128213879. The next prime is 128213963. The reversal of 128213954 is 459312821.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22694 + ... + 27774.

It is an arithmetic number, because the mean of its divisors is an integer number (6952176).

Almost surely, 2^128213954 is an apocalyptic number.

128213954 is a deficient number, since it is larger than the sum of its proper divisors (94255678).

128213954 is a wasteful number, since it uses less digits than its factorization.

128213954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5162.

The product of its digits is 17280, while the sum is 35.

The square root of 128213954 is about 11323.1600712875. The cubic root of 128213954 is about 504.2490606804.

The spelling of 128213954 in words is "one hundred twenty-eight million, two hundred thirteen thousand, nine hundred fifty-four".