128635463 has 12 divisors (see below), whose sum is σ = 143193120. Its totient is φ = 115452480.

The previous prime is 128635459. The next prime is 128635469. The reversal of 128635463 is 364536821.

It is not a de Polignac number, because 128635463 - 2² = 128635459 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128635469) 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, 2831 + ... + 16287.

It is an arithmetic number, because the mean of its divisors is an integer number (11932760).

Almost surely, 2^128635463 is an apocalyptic number.

128635463 is a deficient number, since it is larger than the sum of its proper divisors (14557657).

128635463 is a wasteful number, since it uses less digits than its factorization.

128635463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13558 (or 13547 counting only the distinct ones).

The product of its digits is 103680, while the sum is 38.

The square root of 128635463 is about 11341.7574916765. The cubic root of 128635463 is about 504.8010365446.

The spelling of 128635463 in words is "one hundred twenty-eight million, six hundred thirty-five thousand, four hundred sixty-three".