128428814 has 8 divisors (see below), whose sum is σ = 194410920. Its totient is φ = 63625176.

The previous prime is 128428787. The next prime is 128428823. The reversal of 128428814 is 418824821.

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

It is a congruent number.

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, 294344 + ... + 294779.

It is an arithmetic number, because the mean of its divisors is an integer number (24301365).

Almost surely, 2^128428814 is an apocalyptic number.

128428814 is a deficient number, since it is larger than the sum of its proper divisors (65982106).

128428814 is a wasteful number, since it uses less digits than its factorization.

128428814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589234.

The product of its digits is 32768, while the sum is 38.

The square root of 128428814 is about 11332.6437339219. The cubic root of 128428814 is about 504.5305757728.

The spelling of 128428814 in words is "one hundred twenty-eight million, four hundred twenty-eight thousand, eight hundred fourteen".