128817030 has 32 divisors (see below), whose sum is σ = 314997984. Its totient is φ = 33702656.

The previous prime is 128817023. The next prime is 128817037. The reversal of 128817030 is 30718821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (128817023) and next prime (128817037).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128817037) 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, 38919 + ... + 42098.

It is an arithmetic number, because the mean of its divisors is an integer number (9843687).

Almost surely, 2^128817030 is an apocalyptic number.

128817030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128817030 is an abundant number, since it is smaller than the sum of its proper divisors (186180954).

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

128817030 is a wasteful number, since it uses less digits than its factorization.

128817030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81080.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 128817030 is about 11349.7590282790. The cubic root of 128817030 is about 505.0384312157.

The spelling of 128817030 in words is "one hundred twenty-eight million, eight hundred seventeen thousand, thirty".