128829905397 has 12 divisors (see below), whose sum is σ = 186105934560. Its totient is φ = 85878160488.

The previous prime is 128829905389. The next prime is 128829905429. The reversal of 128829905397 is 793509928821.

128829905397 is a `hidden beast` number, since 1 + 2 + 8 + 8 + 2 + 9 + 90 + 539 + 7 = 666.

It is not a de Polignac number, because 128829905397 - 2³ = 128829905389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128829905377) 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, 606247 + ... + 790692.

It is an arithmetic number, because the mean of its divisors is an integer number (15508827880).

Almost surely, 2^128829905397 is an apocalyptic number.

It is an amenable number.

128829905397 is a deficient number, since it is larger than the sum of its proper divisors (57276029163).

128829905397 is a wasteful number, since it uses less digits than its factorization.

128829905397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407192 (or 1407189 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 63.

The spelling of 128829905397 in words is "one hundred twenty-eight billion, eight hundred twenty-nine million, nine hundred five thousand, three hundred ninety-seven".