128513834 has 48 divisors (see below), whose sum is σ = 217261440. Its totient is φ = 56881440.

The previous prime is 128513831. The next prime is 128513837. The reversal of 128513834 is 438315821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (128513831) and next prime (128513837).

It is a super-3 number, since 3×128513834³ (a number of 25 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 128513794 and 128513803.

It is not an unprimeable number, because it can be changed into a prime (128513831) 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, 1178972 + ... + 1179080.

It is an arithmetic number, because the mean of its divisors is an integer number (4526280).

Almost surely, 2^128513834 is an apocalyptic number.

128513834 is a deficient number, since it is larger than the sum of its proper divisors (88747606).

128513834 is a wasteful number, since it uses less digits than its factorization.

128513834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243 (or 224 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 128513834 is about 11336.3942239144. The cubic root of 128513834 is about 504.6418844585.

The spelling of 128513834 in words is "one hundred twenty-eight million, five hundred thirteen thousand, eight hundred thirty-four".