128149236 has 48 divisors (see below), whose sum is σ = 332886400. Its totient is φ = 42633216.

The previous prime is 128149193. The next prime is 128149253. The reversal of 128149236 is 632941821.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 128149236.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82281 + ... + 83823.

Almost surely, 2^128149236 is an apocalyptic number.

It is an amenable number.

128149236 is an abundant number, since it is smaller than the sum of its proper divisors (204737164).

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

128149236 is a wasteful number, since it uses less digits than its factorization.

128149236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2325 (or 2317 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 128149236 is about 11320.3019394361. The cubic root of 128149236 is about 504.1642038660.

The spelling of 128149236 in words is "one hundred twenty-eight million, one hundred forty-nine thousand, two hundred thirty-six".