28466951857 has 4 divisors (see below), whose sum is σ = 29704645440. Its totient is φ = 27229258276.

The previous prime is 28466951827. The next prime is 28466951861. The reversal of 28466951857 is 75815966482.

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 28466951857 - 2⁷ = 28466951729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28466951795 and 28466951804.

It is not an unprimeable number, because it can be changed into a prime (28466951827) 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, 618846757 + ... + 618846802.

It is an arithmetic number, because the mean of its divisors is an integer number (7426161360).

Almost surely, 2^28466951857 is an apocalyptic number.

It is an amenable number.

28466951857 is a deficient number, since it is larger than the sum of its proper divisors (1237693583).

28466951857 is a wasteful number, since it uses less digits than its factorization.

28466951857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237693582.

The product of its digits is 29030400, while the sum is 61.

The spelling of 28466951857 in words is "twenty-eight billion, four hundred sixty-six million, nine hundred fifty-one thousand, eight hundred fifty-seven".