128802478 has 24 divisors (see below), whose sum is σ = 225313704. Its totient is φ = 55062000.

The previous prime is 128802473. The next prime is 128802481. The reversal of 128802478 is 874208821.

It is a self number, because there is not a number n which added to its sum of digits gives 128802478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128802473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43753 + ... + 46603.

It is an arithmetic number, because the mean of its divisors is an integer number (9388071).

Almost surely, 2^128802478 is an apocalyptic number.

128802478 is a deficient number, since it is larger than the sum of its proper divisors (96511226).

128802478 is a wasteful number, since it uses less digits than its factorization.

128802478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3328 (or 3321 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 40.

The square root of 128802478 is about 11349.1179392938. The cubic root of 128802478 is about 505.0194130367.

The spelling of 128802478 in words is "one hundred twenty-eight million, eight hundred two thousand, four hundred seventy-eight".