28656201 has 8 divisors (see below), whose sum is σ = 43666624. Its totient is φ = 16374960.

The previous prime is 28656197. The next prime is 28656227. The reversal of 28656201 is 10265682.

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

It is not a de Polignac number, because 28656201 - 2² = 28656197 is a prime.

It is a super-4 number, since 4×28656201⁴ (a number of 31 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28656401) 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, 682270 + ... + 682311.

It is an arithmetic number, because the mean of its divisors is an integer number (5458328).

Almost surely, 2^28656201 is an apocalyptic number.

28656201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28656201 is a deficient number, since it is larger than the sum of its proper divisors (15010423).

28656201 is a wasteful number, since it uses less digits than its factorization.

28656201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364591.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 28656201 is about 5353.1486995973. The cubic root of 28656201 is about 306.0127616533.

The spelling of 28656201 in words is "twenty-eight million, six hundred fifty-six thousand, two hundred one".