128347956 has 48 divisors (see below), whose sum is σ = 363007680. Its totient is φ = 38892960.

The previous prime is 128347937. The next prime is 128347957. The reversal of 128347956 is 659743821.

128347956 is a `hidden beast` number, since 128 + 3 + 479 + 56 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128347957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52831 + ... + 55206.

It is an arithmetic number, because the mean of its divisors is an integer number (7562660).

Almost surely, 2^128347956 is an apocalyptic number.

It is an amenable number.

128347956 is an abundant number, since it is smaller than the sum of its proper divisors (234659724).

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

128347956 is a wasteful number, since it uses less digits than its factorization.

128347956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108061 (or 108053 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 128347956 is about 11329.0756904524. The cubic root of 128347956 is about 504.4246704169.

The spelling of 128347956 in words is "one hundred twenty-eight million, three hundred forty-seven thousand, nine hundred fifty-six".