28670001 has 16 divisors (see below), whose sum is σ = 38808000. Its totient is φ = 18825408.

The previous prime is 28669967. The next prime is 28670003. The reversal of 28670001 is 10007682.

28670001 = T₄₃₈ + T₄₃₉ + ... + T₆₃₄.

It is not a de Polignac number, because 28670001 - 2¹⁰ = 28668977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28670003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81975 + ... + 82323.

It is an arithmetic number, because the mean of its divisors is an integer number (2425500).

Almost surely, 2^28670001 is an apocalyptic number.

It is an amenable number.

28670001 is a deficient number, since it is larger than the sum of its proper divisors (10137999).

28670001 is a wasteful number, since it uses less digits than its factorization.

28670001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 28670001 is about 5354.4375054715. The cubic root of 28670001 is about 306.0618760771.

Adding to 28670001 its reverse (10007682), we get a palindrome (38677683).

The spelling of 28670001 in words is "twenty-eight million, six hundred seventy thousand, one".