128513836 has 24 divisors (see below), whose sum is σ = 245661696. Its totient is φ = 58339920.

The previous prime is 128513831. The next prime is 128513837. The reversal of 128513836 is 638315821.

It is a junction number, because it is equal to n+sod(n) for n = 128513795 and 128513804.

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 7 ways as a sum of consecutive naturals, for example, 46485 + ... + 49171.

It is an arithmetic number, because the mean of its divisors is an integer number (10235904).

Almost surely, 2^128513836 is an apocalyptic number.

It is an amenable number.

128513836 is a deficient number, since it is larger than the sum of its proper divisors (117147860).

128513836 is a wasteful number, since it uses less digits than its factorization.

128513836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3789 (or 3787 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 128513836 is about 11336.3943121259. The cubic root of 128513836 is about 504.6418870764.

The spelling of 128513836 in words is "one hundred twenty-eight million, five hundred thirteen thousand, eight hundred thirty-six".