128087870 has 16 divisors (see below), whose sum is σ = 232320528. Its totient is φ = 50843520.

The previous prime is 128087857. The next prime is 128087891. The reversal of 128087870 is 78780821.

It is a super-2 number, since 2×128087870² = 32813004882273800, which contains 22 as substring.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 47579 + ... + 50198.

It is an arithmetic number, because the mean of its divisors is an integer number (14520033).

Almost surely, 2^128087870 is an apocalyptic number.

128087870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128087870 is a deficient number, since it is larger than the sum of its proper divisors (104232658).

128087870 is a wasteful number, since it uses less digits than its factorization.

128087870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97915.

The product of its (nonzero) digits is 50176, while the sum is 41.

The square root of 128087870 is about 11317.5911748039. The cubic root of 128087870 is about 504.0837157277.

The spelling of 128087870 in words is "one hundred twenty-eight million, eighty-seven thousand, eight hundred seventy".