128946807 has 12 divisors (see below), whose sum is σ = 203189064. Its totient is φ = 78149520.

The previous prime is 128946781. The next prime is 128946823. The reversal of 128946807 is 708649821.

It is not a de Polignac number, because 128946807 - 2⁷ = 128946679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128947807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 651148 + ... + 651345.

It is an arithmetic number, because the mean of its divisors is an integer number (16932422).

Almost surely, 2^128946807 is an apocalyptic number.

128946807 is a deficient number, since it is larger than the sum of its proper divisors (74242257).

128946807 is a wasteful number, since it uses less digits than its factorization.

128946807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302510 (or 1302507 counting only the distinct ones).

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

The square root of 128946807 is about 11355.4747588993. The cubic root of 128946807 is about 505.2079749852.

It can be divided in two parts, 12894 and 6807, that added together give a triangular number (19701 = T₁₉₈).

The spelling of 128946807 in words is "one hundred twenty-eight million, nine hundred forty-six thousand, eight hundred seven".