128945494 has 16 divisors (see below), whose sum is σ = 196653600. Its totient is φ = 63403200.

The previous prime is 128945489. The next prime is 128945497. The reversal of 128945494 is 494549821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128945497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28594 + ... + 32794.

It is an arithmetic number, because the mean of its divisors is an integer number (12290850).

Almost surely, 2^128945494 is an apocalyptic number.

128945494 is a deficient number, since it is larger than the sum of its proper divisors (67708106).

128945494 is a wasteful number, since it uses less digits than its factorization.

128945494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4455.

The product of its digits is 414720, while the sum is 46.

The square root of 128945494 is about 11355.4169452293. The cubic root of 128945494 is about 505.2062602204.

The spelling of 128945494 in words is "one hundred twenty-eight million, nine hundred forty-five thousand, four hundred ninety-four".