128913534 has 12 divisors (see below), whose sum is σ = 279312696. Its totient is φ = 42971172.

The previous prime is 128913529. The next prime is 128913539. The reversal of 128913534 is 435319821.

It is an interprime number because it is at equal distance from previous prime (128913529) and next prime (128913539).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128913539) 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, 3580914 + ... + 3580949.

It is an arithmetic number, because the mean of its divisors is an integer number (23276058).

Almost surely, 2^128913534 is an apocalyptic number.

128913534 is an abundant number, since it is smaller than the sum of its proper divisors (150399162).

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

128913534 is a wasteful number, since it uses less digits than its factorization.

128913534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7161871 (or 7161868 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 128913534 is about 11354.0096001369. The cubic root of 128913534 is about 505.1645171920.

The spelling of 128913534 in words is "one hundred twenty-eight million, nine hundred thirteen thousand, five hundred thirty-four".