128902863 has 16 divisors (see below), whose sum is σ = 176394240. Its totient is φ = 83685504.

The previous prime is 128902861. The next prime is 128902871. The reversal of 128902863 is 368209821.

It is a happy number.

It is not a de Polignac number, because 128902863 - 2¹ = 128902861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128902861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48103 + ... + 50711.

It is an arithmetic number, because the mean of its divisors is an integer number (11024640).

Almost surely, 2^128902863 is an apocalyptic number.

128902863 is a deficient number, since it is larger than the sum of its proper divisors (47491377).

128902863 is a wasteful number, since it uses less digits than its factorization.

128902863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3038.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 128902863 is about 11353.5396683149. The cubic root of 128902863 is about 505.1505782384.

It can be divided in two parts, 12890 and 2863, that added together give a triangular number (15753 = T₁₇₇).

The spelling of 128902863 in words is "one hundred twenty-eight million, nine hundred two thousand, eight hundred sixty-three".