28908606406 has 4 divisors (see below), whose sum is σ = 43362909612. Its totient is φ = 14454303202.

The previous prime is 28908606373. The next prime is 28908606427. The reversal of 28908606406 is 60460680982.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28908606406.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 7227151600 + ... + 7227151603.

It is an arithmetic number, because the mean of its divisors is an integer number (10840727403).

Almost surely, 2^28908606406 is an apocalyptic number.

28908606406 is a deficient number, since it is larger than the sum of its proper divisors (14454303206).

28908606406 is a wasteful number, since it uses less digits than its factorization.

28908606406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14454303205.

The product of its (nonzero) digits is 995328, while the sum is 49.

The spelling of 28908606406 in words is "twenty-eight billion, nine hundred eight million, six hundred six thousand, four hundred six".