28789688402 has 16 divisors (see below), whose sum is σ = 46566122400. Its totient is φ = 13304604960.

The previous prime is 28789688401. The next prime is 28789688429. The reversal of 28789688402 is 20488698782.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28789688401) 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, 9237752 + ... + 9240867.

It is an arithmetic number, because the mean of its divisors is an integer number (2910382650).

Almost surely, 2^28789688402 is an apocalyptic number.

28789688402 is a deficient number, since it is larger than the sum of its proper divisors (17776433998).

28789688402 is a wasteful number, since it uses less digits than its factorization.

28789688402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18478681.

The product of its (nonzero) digits is 24772608, while the sum is 62.

The spelling of 28789688402 in words is "twenty-eight billion, seven hundred eighty-nine million, six hundred eighty-eight thousand, four hundred two".