28358023577 has 4 divisors (see below), whose sum is σ = 30539410020. Its totient is φ = 26176637136.

The previous prime is 28358023559. The next prime is 28358023579. The reversal of 28358023577 is 77532085382.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3753277696 + 24604745881 = 61264^2 + 156859^2 .

It is not a de Polignac number, because 28358023577 - 2⁶ = 28358023513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28358023579) 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, 1090693202 + ... + 1090693227.

It is an arithmetic number, because the mean of its divisors is an integer number (7634852505).

Almost surely, 2^28358023577 is an apocalyptic number.

It is an amenable number.

28358023577 is a deficient number, since it is larger than the sum of its proper divisors (2181386443).

28358023577 is a wasteful number, since it uses less digits than its factorization.

28358023577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2181386442.

The product of its (nonzero) digits is 2822400, while the sum is 50.

The spelling of 28358023577 in words is "twenty-eight billion, three hundred fifty-eight million, twenty-three thousand, five hundred seventy-seven".