28340177 has 4 divisors (see below), whose sum is σ = 28563456. Its totient is φ = 28116900.

The previous prime is 28340171. The next prime is 28340189. The reversal of 28340177 is 77104382.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 77104382 = 2 ⋅38552191.

It is a cyclic number.

It is not a de Polignac number, because 28340177 - 2¹² = 28336081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28340171) 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, 111449 + ... + 111702.

It is an arithmetic number, because the mean of its divisors is an integer number (7140864).

Almost surely, 2^28340177 is an apocalyptic number.

It is an amenable number.

28340177 is a deficient number, since it is larger than the sum of its proper divisors (223279).

28340177 is a wasteful number, since it uses less digits than its factorization.

28340177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223278.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 28340177 is about 5323.5492859558. The cubic root of 28340177 is about 304.8836858284.

The spelling of 28340177 in words is "twenty-eight million, three hundred forty thousand, one hundred seventy-seven".