128242700 has 18 divisors (see below), whose sum is σ = 278286876. Its totient is φ = 51297040.

The previous prime is 128242693. The next prime is 128242717. The reversal of 128242700 is 7242821.

It is a self number, because there is not a number n which added to its sum of digits gives 128242700.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 641114 + ... + 641313.

It is an arithmetic number, because the mean of its divisors is an integer number (15460382).

Almost surely, 2^128242700 is an apocalyptic number.

128242700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128242700 is an abundant number, since it is smaller than the sum of its proper divisors (150044176).

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

128242700 is a wasteful number, since it uses less digits than its factorization.

128242700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282441 (or 1282434 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 128242700 is about 11324.4293454461. The cubic root of 128242700 is about 504.2867426432.

The spelling of 128242700 in words is "one hundred twenty-eight million, two hundred forty-two thousand, seven hundred".