28656420754 has 8 divisors (see below), whose sum is σ = 46291141260. Its totient is φ = 13226040336.

The previous prime is 28656420743. The next prime is 28656420763. The reversal of 28656420754 is 45702465682.

It can be written as a sum of positive squares in 2 ways, for example, as 27648040729 + 1008380025 = 166277^2 + 31755^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 28656420698 and 28656420707.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 551084989 + ... + 551085040.

Almost surely, 2^28656420754 is an apocalyptic number.

28656420754 is a deficient number, since it is larger than the sum of its proper divisors (17634720506).

28656420754 is a wasteful number, since it uses less digits than its factorization.

28656420754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102170044.

The product of its (nonzero) digits is 3225600, while the sum is 49.

The spelling of 28656420754 in words is "twenty-eight billion, six hundred fifty-six million, four hundred twenty thousand, seven hundred fifty-four".