128463642 has 24 divisors (see below), whose sum is σ = 279054516. Its totient is φ = 42710976.

The previous prime is 128463641. The next prime is 128463653. The reversal of 128463642 is 246364821.

128463642 is a `hidden beast` number, since 1 + 2 + 8 + 4 + 6 + 3 + 642 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 127441521 + 1022121 = 11289^2 + 1011^2 .

It is a junction number, because it is equal to n+sod(n) for n = 128463597 and 128463606.

It is not an unprimeable number, because it can be changed into a prime (128463641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1843 + ... + 16134.

Almost surely, 2^128463642 is an apocalyptic number.

128463642 is an abundant number, since it is smaller than the sum of its proper divisors (150590874).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128463642 is a wasteful number, since it uses less digits than its factorization.

128463642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18382 (or 18379 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 128463642 is about 11334.1802526694. The cubic root of 128463642 is about 504.5761787342.

The spelling of 128463642 in words is "one hundred twenty-eight million, four hundred sixty-three thousand, six hundred forty-two".