128894067 has 24 divisors (see below), whose sum is σ = 193284000. Its totient is φ = 82672128.

The previous prime is 128894057. The next prime is 128894071. The reversal of 128894067 is 760498821.

It is not a de Polignac number, because 128894067 - 2⁸ = 128893811 is a prime.

It is a super-2 number, since 2×128894067² = 33227361015600978, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128894027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91434 + ... + 92832.

It is an arithmetic number, because the mean of its divisors is an integer number (8053500).

Almost surely, 2^128894067 is an apocalyptic number.

128894067 is a deficient number, since it is larger than the sum of its proper divisors (64389933).

128894067 is a wasteful number, since it uses less digits than its factorization.

128894067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1787 (or 1784 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 128894067 is about 11353.1522935262. The cubic root of 128894067 is about 505.1390879181.

The spelling of 128894067 in words is "one hundred twenty-eight million, eight hundred ninety-four thousand, sixty-seven".