128047836 has 24 divisors (see below), whose sum is σ = 341461120. Its totient is φ = 36585072.

The previous prime is 128047823. The next prime is 128047837. The reversal of 128047836 is 638740821.

It is a junction number, because it is equal to n+sod(n) for n = 128047794 and 128047803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128047837) 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, 762106 + ... + 762273.

Almost surely, 2^128047836 is an apocalyptic number.

It is an amenable number.

128047836 is an abundant number, since it is smaller than the sum of its proper divisors (213413284).

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

128047836 is a wasteful number, since it uses less digits than its factorization.

128047836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524393 (or 1524391 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 128047836 is about 11315.8223740036. The cubic root of 128047836 is about 504.0311929548.

The spelling of 128047836 in words is "one hundred twenty-eight million, forty-seven thousand, eight hundred thirty-six".