28658161723 has 8 divisors (see below), whose sum is σ = 30414022128. Its totient is φ = 26910088704.

The previous prime is 28658161691. The next prime is 28658161733. The reversal of 28658161723 is 32716185682.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28658161723 - 2⁵ = 28658161691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28658161733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1939261 + ... + 1953982.

It is an arithmetic number, because the mean of its divisors is an integer number (3801752766).

Almost surely, 2^28658161723 is an apocalyptic number.

28658161723 is a deficient number, since it is larger than the sum of its proper divisors (1755860405).

28658161723 is a wasteful number, since it uses less digits than its factorization.

28658161723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3893693.

The product of its digits is 967680, while the sum is 49.

The spelling of 28658161723 in words is "twenty-eight billion, six hundred fifty-eight million, one hundred sixty-one thousand, seven hundred twenty-three".