128870370 has 48 divisors (see below), whose sum is σ = 354776760. Its totient is φ = 32343552.

The previous prime is 128870363. The next prime is 128870383. The reversal of 128870370 is 73078821.

128870370 is a `hidden beast` number, since 1 + 288 + 7 + 0 + 370 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 90269001 + 38601369 = 9501^2 + 6213^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40585 + ... + 43644.

Almost surely, 2^128870370 is an apocalyptic number.

128870370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128870370 is an abundant number, since it is smaller than the sum of its proper divisors (225906390).

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

128870370 is a wasteful number, since it uses less digits than its factorization.

128870370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84259 (or 84256 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 128870370 is about 11352.1086147024. The cubic root of 128870370 is about 505.1081296413.

The spelling of 128870370 in words is "one hundred twenty-eight million, eight hundred seventy thousand, three hundred seventy".