128249156 has 24 divisors (see below), whose sum is σ = 271587456. Its totient is φ = 51730560.

The previous prime is 128249137. The next prime is 128249159. The reversal of 128249156 is 651942821.

It is not an unprimeable number, because it can be changed into a prime (128249159) 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, 134240 + ... + 135191.

It is an arithmetic number, because the mean of its divisors is an integer number (11316144).

Almost surely, 2^128249156 is an apocalyptic number.

It is an amenable number.

128249156 is an abundant number, since it is smaller than the sum of its proper divisors (143338300).

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

128249156 is a wasteful number, since it uses less digits than its factorization.

128249156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269459 (or 269457 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 128249156 is about 11324.7143893345. The cubic root of 128249156 is about 504.2952047768.

The spelling of 128249156 in words is "one hundred twenty-eight million, two hundred forty-nine thousand, one hundred fifty-six".