28706628677261 has 4 divisors (see below), whose sum is σ = 28706717892000. Its totient is φ = 28706539462524.

The previous prime is 28706628677257. The next prime is 28706628677263. The reversal of 28706628677261 is 16277682660782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28706628677261 - 2² = 28706628677257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28706628677191 and 28706628677200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28706628677263) 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, 44122961 + ... + 44768838.

It is an arithmetic number, because the mean of its divisors is an integer number (7176679473000).

Almost surely, 2^{28706628677261} is an apocalyptic number.

It is an amenable number.

28706628677261 is a deficient number, since it is larger than the sum of its proper divisors (89214739).

28706628677261 is an equidigital number, since it uses as much as digits as its factorization.

28706628677261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89214738.

The product of its (nonzero) digits is 227598336, while the sum is 68.

The spelling of 28706628677261 in words is "twenty-eight trillion, seven hundred six billion, six hundred twenty-eight million, six hundred seventy-seven thousand, two hundred sixty-one".