128876590 has 64 divisors (see below), whose sum is σ = 252274176. Its totient is φ = 47279232.

The previous prime is 128876569. The next prime is 128876593. The reversal of 128876590 is 95678821.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a self number, because there is not a number n which added to its sum of digits gives 128876590.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128876593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 820792 + ... + 820948.

It is an arithmetic number, because the mean of its divisors is an integer number (3941784).

Almost surely, 2^128876590 is an apocalyptic number.

128876590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128876590 is a deficient number, since it is larger than the sum of its proper divisors (123397586).

128876590 is a wasteful number, since it uses less digits than its factorization.

128876590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313.

The product of its (nonzero) digits is 241920, while the sum is 46.

The square root of 128876590 is about 11352.3825693112. The cubic root of 128876590 is about 505.1162559521.

The spelling of 128876590 in words is "one hundred twenty-eight million, eight hundred seventy-six thousand, five hundred ninety".