128802638 has 16 divisors (see below), whose sum is σ = 195417600. Its totient is φ = 63667296.

The previous prime is 128802631. The next prime is 128802649. The reversal of 128802638 is 836208821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128802631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87920 + ... + 89372.

It is an arithmetic number, because the mean of its divisors is an integer number (12213600).

Almost surely, 2^128802638 is an apocalyptic number.

128802638 is a deficient number, since it is larger than the sum of its proper divisors (66614962).

128802638 is a wasteful number, since it uses less digits than its factorization.

128802638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1931.

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 128802638 is about 11349.1249882976. The cubic root of 128802638 is about 505.0196221503.

The spelling of 128802638 in words is "one hundred twenty-eight million, eight hundred two thousand, six hundred thirty-eight".