128390974 has 8 divisors (see below), whose sum is σ = 192646440. Its totient is φ = 64175496.

The previous prime is 128390971. The next prime is 128391017. The reversal of 128390974 is 479093821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 128390974.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128390971) 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 3 ways as a sum of consecutive naturals, for example, 52 + ... + 16024.

It is an arithmetic number, because the mean of its divisors is an integer number (24080805).

Almost surely, 2^128390974 is an apocalyptic number.

128390974 is a deficient number, since it is larger than the sum of its proper divisors (64255466).

128390974 is a wasteful number, since it uses less digits than its factorization.

128390974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19994.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 128390974 is about 11330.9740975787. The cubic root of 128390974 is about 504.4810196239.

The spelling of 128390974 in words is "one hundred twenty-eight million, three hundred ninety thousand, nine hundred seventy-four".