128647474 has 8 divisors (see below), whose sum is σ = 193528368. Its totient is φ = 64138020.

The previous prime is 128647469. The next prime is 128647513. The reversal of 128647474 is 474746821.

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 128647474.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91992 + ... + 93379.

It is an arithmetic number, because the mean of its divisors is an integer number (24191046).

Almost surely, 2^128647474 is an apocalyptic number.

128647474 is a deficient number, since it is larger than the sum of its proper divisors (64880894).

128647474 is a wasteful number, since it uses less digits than its factorization.

128647474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185720.

The product of its digits is 301056, while the sum is 43.

The square root of 128647474 is about 11342.2869827914. The cubic root of 128647474 is about 504.8167475479.

The spelling of 128647474 in words is "one hundred twenty-eight million, six hundred forty-seven thousand, four hundred seventy-four".