128573827 has 16 divisors (see below), whose sum is σ = 135783648. Its totient is φ = 121605120.

The previous prime is 128573807. The next prime is 128573831. The reversal of 128573827 is 728375821.

It is a cyclic number.

It is not a de Polignac number, because 128573827 - 2⁷ = 128573699 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128573807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 410623 + ... + 410935.

It is an arithmetic number, because the mean of its divisors is an integer number (8486478).

Almost surely, 2^128573827 is an apocalyptic number.

128573827 is a deficient number, since it is larger than the sum of its proper divisors (7209821).

128573827 is a wasteful number, since it uses less digits than its factorization.

128573827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630.

The product of its digits is 188160, while the sum is 43.

The square root of 128573827 is about 11339.0399505426. The cubic root of 128573827 is about 504.7203981092.

The spelling of 128573827 in words is "one hundred twenty-eight million, five hundred seventy-three thousand, eight hundred twenty-seven".