28055877 has 8 divisors (see below), whose sum is σ = 37693920. Its totient is φ = 18560880.

The previous prime is 28055873. The next prime is 28055887. The reversal of 28055877 is 77855082.

It is a happy number.

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

It is not a de Polignac number, because 28055877 - 2² = 28055873 is a prime.

It is a super-3 number, since 3×28055877³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28055873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35302 + ... + 36087.

It is an arithmetic number, because the mean of its divisors is an integer number (4711740).

Almost surely, 2^28055877 is an apocalyptic number.

It is an amenable number.

28055877 is a deficient number, since it is larger than the sum of its proper divisors (9638043).

28055877 is a wasteful number, since it uses less digits than its factorization.

28055877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71523.

The product of its (nonzero) digits is 156800, while the sum is 42.

The square root of 28055877 is about 5296.7798708272. The cubic root of 28055877 is about 303.8607575904.

The spelling of 28055877 in words is "twenty-eight million, fifty-five thousand, eight hundred seventy-seven".