28780476406 has 16 divisors (see below), whose sum is σ = 47131023888. Its totient is φ = 13072118400.

The previous prime is 28780476397. The next prime is 28780476437. The reversal of 28780476406 is 60467408782.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 466095 + ... + 524218.

It is an arithmetic number, because the mean of its divisors is an integer number (2945688993).

Almost surely, 2^28780476406 is an apocalyptic number.

28780476406 is a deficient number, since it is larger than the sum of its proper divisors (18350547482).

28780476406 is a wasteful number, since it uses less digits than its factorization.

28780476406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991647.

The product of its (nonzero) digits is 3612672, while the sum is 52.

The spelling of 28780476406 in words is "twenty-eight billion, seven hundred eighty million, four hundred seventy-six thousand, four hundred six".