128406136 has 16 divisors (see below), whose sum is σ = 242155800. Its totient is φ = 63831264.

The previous prime is 128406119. The next prime is 128406139. The reversal of 128406136 is 631604821.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 128406098 and 128406107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128406139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45006 + ... + 47773.

Almost surely, 2^128406136 is an apocalyptic number.

It is an amenable number.

128406136 is a deficient number, since it is larger than the sum of its proper divisors (113749664).

128406136 is a wasteful number, since it uses less digits than its factorization.

128406136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92958 (or 92954 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 128406136 is about 11331.6431288671. The cubic root of 128406136 is about 504.5008773026.

The spelling of 128406136 in words is "one hundred twenty-eight million, four hundred six thousand, one hundred thirty-six".