128763441 has 12 divisors (see below), whose sum is σ = 191018932. Its totient is φ = 83522016.

The previous prime is 128763433. The next prime is 128763449. The reversal of 128763441 is 144367821.

128763441 is a `hidden beast` number, since 12 + 8 + 7 + 634 + 4 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (128763433) and next prime (128763449).

It can be written as a sum of positive squares in 2 ways, for example, as 52707600 + 76055841 = 7260^2 + 8721^2 .

It is not a de Polignac number, because 128763441 - 2³ = 128763433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128763396 and 128763405.

It is not an unprimeable number, because it can be changed into a prime (128763449) 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, 193006 + ... + 193671.

Almost surely, 2^128763441 is an apocalyptic number.

It is an amenable number.

128763441 is a deficient number, since it is larger than the sum of its proper divisors (62255491).

128763441 is a wasteful number, since it uses less digits than its factorization.

128763441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386720 (or 386717 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 128763441 is about 11347.3979836789. The cubic root of 128763441 is about 504.9683880483.

The spelling of 128763441 in words is "one hundred twenty-eight million, seven hundred sixty-three thousand, four hundred forty-one".