863648128 has 48 divisors (see below), whose sum is σ = 2001469500. Its totient is φ = 370132224.

The previous prime is 863648119. The next prime is 863648129. The reversal of 863648128 is 821846368.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863648129) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62578 + ... + 75121.

Almost surely, 2^863648128 is an apocalyptic number.

It is an amenable number.

863648128 is an abundant number, since it is smaller than the sum of its proper divisors (1137821372).

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

863648128 is a wasteful number, since it uses less digits than its factorization.

863648128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137727 (or 137708 counting only the distinct ones).

The product of its digits is 442368, while the sum is 46.

The square root of 863648128 is about 29387.8908395958. The cubic root of 863648128 is about 952.3113168692.

The spelling of 863648128 in words is "eight hundred sixty-three million, six hundred forty-eight thousand, one hundred twenty-eight".