28578101 has 8 divisors (see below), whose sum is σ = 29350464. Its totient is φ = 27810720.

The previous prime is 28578091. The next prime is 28578103. The reversal of 28578101 is 10187582.

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 28578101 - 2¹⁰ = 28577077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28578103) 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, 12305 + ... + 14441.

It is an arithmetic number, because the mean of its divisors is an integer number (3668808).

Almost surely, 2^28578101 is an apocalyptic number.

It is an amenable number.

28578101 is a deficient number, since it is larger than the sum of its proper divisors (772363).

28578101 is a wasteful number, since it uses less digits than its factorization.

28578101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2491.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 28578101 is about 5345.8489503539. The cubic root of 28578101 is about 305.7345049307.

The spelling of 28578101 in words is "twenty-eight million, five hundred seventy-eight thousand, one hundred one".