28480001 has 16 divisors (see below), whose sum is σ = 32607360. Its totient is φ = 24635520.

The previous prime is 28479991. The next prime is 28480019. The reversal of 28480001 is 10008482.

It is a cyclic number.

It is not a de Polignac number, because 28480001 - 2⁶ = 28479937 is a prime.

It is a super-2 number, since 2×28480001² = 1622220913920002, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28480021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22676 + ... + 23898.

It is an arithmetic number, because the mean of its divisors is an integer number (2037960).

Almost surely, 2^28480001 is an apocalyptic number.

It is an amenable number.

28480001 is a deficient number, since it is larger than the sum of its proper divisors (4127359).

28480001 is a wasteful number, since it uses less digits than its factorization.

28480001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 28480001 is about 5336.6657193420. The cubic root of 28480001 is about 305.3842724339.

Adding to 28480001 its reverse (10008482), we get a palindrome (38488483).

The spelling of 28480001 in words is "twenty-eight million, four hundred eighty thousand, one".