128833650 has 144 divisors (see below), whose sum is σ = 400072608. Its totient is φ = 29376000.

The previous prime is 128833609. The next prime is 128833657. The reversal of 128833650 is 56338821.

It is not an unprimeable number, because it can be changed into a prime (128833657) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 83385 + ... + 84915.

It is an arithmetic number, because the mean of its divisors is an integer number (2778282).

Almost surely, 2^128833650 is an apocalyptic number.

128833650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 128833650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200036304).

128833650 is an abundant number, since it is smaller than the sum of its proper divisors (271238958).

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

128833650 is a wasteful number, since it uses less digits than its factorization.

128833650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1577 (or 1569 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 128833650 is about 11350.4911787993. The cubic root of 128833650 is about 505.0601503361.

The spelling of 128833650 in words is "one hundred twenty-eight million, eight hundred thirty-three thousand, six hundred fifty".