28634430786 has 32 divisors (see below), whose sum is σ = 62417234880. Its totient is φ = 8704440384.

The previous prime is 28634430767. The next prime is 28634430857. The reversal of 28634430786 is 68703443682.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2205021 + ... + 2217968.

It is an arithmetic number, because the mean of its divisors is an integer number (1950538590).

Almost surely, 2^28634430786 is an apocalyptic number.

28634430786 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28634430786 is an abundant number, since it is smaller than the sum of its proper divisors (33782804094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28634430786 is a wasteful number, since it uses less digits than its factorization.

28634430786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4423090.

The product of its (nonzero) digits is 4644864, while the sum is 51.

The spelling of 28634430786 in words is "twenty-eight billion, six hundred thirty-four million, four hundred thirty thousand, seven hundred eighty-six".