128004534 has 48 divisors (see below), whose sum is σ = 325542048. Its totient is φ = 35582976.

The previous prime is 128004533. The next prime is 128004581. The reversal of 128004534 is 435400821.

128004534 is a `hidden beast` number, since 128 + 0 + 0 + 4 + 534 = 666.

It is a super-3 number, since 3×128004534³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128004498 and 128004507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128004533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9067 + ... + 18390.

It is an arithmetic number, because the mean of its divisors is an integer number (6782126).

Almost surely, 2^128004534 is an apocalyptic number.

128004534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

128004534 is an abundant number, since it is smaller than the sum of its proper divisors (197537514).

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

128004534 is a wasteful number, since it uses less digits than its factorization.

128004534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27509 (or 27506 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 128004534 is about 11313.9088735945. The cubic root of 128004534 is about 503.9743703898.

The spelling of 128004534 in words is "one hundred twenty-eight million, four thousand, five hundred thirty-four".