28763078506 has 8 divisors (see below), whose sum is σ = 43196664420. Its totient is φ = 14364190368.

The previous prime is 28763078417. The next prime is 28763078507. The reversal of 28763078506 is 60587036782.

It can be written as a sum of positive squares in 2 ways, for example, as 28456653481 + 306425025 = 168691^2 + 17505^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (28763078507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8672371 + ... + 8675686.

Almost surely, 2^28763078506 is an apocalyptic number.

28763078506 is a deficient number, since it is larger than the sum of its proper divisors (14433585914).

28763078506 is a wasteful number, since it uses less digits than its factorization.

28763078506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17348888.

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 28763078506 in words is "twenty-eight billion, seven hundred sixty-three million, seventy-eight thousand, five hundred six".